WO2021177701A1 - Dispositif électronique pour mesurer un signal biométrique à l'aide de lumière et procédé de fonctionnement correspondant - Google Patents

Dispositif électronique pour mesurer un signal biométrique à l'aide de lumière et procédé de fonctionnement correspondant Download PDF

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Publication number
WO2021177701A1
WO2021177701A1 PCT/KR2021/002567 KR2021002567W WO2021177701A1 WO 2021177701 A1 WO2021177701 A1 WO 2021177701A1 KR 2021002567 W KR2021002567 W KR 2021002567W WO 2021177701 A1 WO2021177701 A1 WO 2021177701A1
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signal
amplifier
channel
light receiving
receiving unit
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PCT/KR2021/002567
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English (en)
Korean (ko)
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이지훈
박정민
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삼성전자 주식회사
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/681—Wristwatch-type devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/74—Details of notification to user or communication with user or patient ; user input means
    • A61B5/742—Details of notification to user or communication with user or patient ; user input means using visual displays
    • A61B5/7445—Display arrangements, e.g. multiple display units

Definitions

  • Various embodiments of the present disclosure relate to an electronic device for measuring a biosignal using light and an operating method thereof.
  • the biosignal that can be measured using the sensor may include, for example, blood pressure/heart rate measurement (HRM), heart rate variability (HRV), photoplethysmography (or photoplethysmography).
  • HRM blood pressure/heart rate measurement
  • HRV heart rate variability
  • PPG photoplethysmography
  • ECG electrocardiogram
  • SpO 2 oxygen saturation
  • a user has widely used a portable smart device (eg, an electronic device, a wearable device) including a biosensor for the user's health care. Accordingly, when a bio-signal provided for a user's health care is inaccurately measured due to various factors (eg, noise), incorrect bio-information may be provided to the user.
  • the biosignal may be influenced by numerous factors such as the user's emotional state and the surrounding environment such as temperature, humidity, and/or electromagnetic waves and may change in real time.
  • the PPG sensor may be a sensor that measures a user's heart rate using light (or light).
  • the PPG sensor includes a light emitting unit for emitting light, a light receiving unit for detecting and reflecting light emitted from the light emitting unit and converting it into electrical energy, and a front-end module for processing electrical energy output from the light receiving unit (eg, : AFE, analog front-end) can be included.
  • a light emitting unit eg, LED, light-emitting diode
  • a light receiving unit eg, PD, photodiode
  • DC direct current
  • PI perfusion index
  • PI may indicate a ratio of an AC (alternative current) component to a DC component, which may vary from person to person and may also be different depending on skin color.
  • the measured value is about 0.1% based on the skin of medium light series (eg, type III (14-20) of Von Luschan's chromatic scale), for example, AC
  • the magnitude of the DC signal may be about 500mV.
  • the operating range of the receiving end of the sensor is about 1.0V, it can be said that the DC signal is limited to 50% of the operating range. This is the reason that the gain of the receiving end cannot be increased in order to increase the signal to noise ratio (SNR) of the sensor, and for this reason, techniques for removing the DC signal are provided to the front-end module.
  • SNR signal to noise ratio
  • the technology applied to the existing sensor is a digital-to-analog (D/A) converter of the front-end module from the processor (eg, MCU, micro controller unit) based on the output of the front-end module. ) to remove DC, which may have limitations in that it is not a real-time compensation. In addition, since it has a delay time of at least one sample or more, it is difficult to effectively remove the abrupt DC change.
  • D/A digital-to-analog
  • the processor in the prior art, in the prior art for DC removal, the processor has a feedback structure for controlling the D/A converter, which increases the complexity of the system and requires additional current consumption. and stability may be reduced.
  • noise may tend to increase as the current of the D/A converter increases.
  • an electronic device for measuring a biosignal using light and an operating method thereof are disclosed.
  • a novel structure of a sensor capable of efficiently removing a DC component generated at a receiving end of the sensor and an operating method thereof are disclosed.
  • the two signals out of phase are differentially converted to an A/D converter by dividing the signals into at least two channels and inverting the phase difference between the signals from the at least two channels (eg, about 180 degrees).
  • a structure of a receiving end of a sensor capable of input, removing a DC component and providing an AC component, and an operation method thereof are disclosed.
  • a structure of a receiving end of a sensor and an operating method thereof, which enable AC component measurement or DC component and AC component measurement based on switching between operations of the sensor to obtain an optimized signal suitable for a situation discloses about
  • An electronic device includes a light receiving unit including a light emitting unit outputting light, a first light receiving unit detecting the light in a first channel, and a second light receiving unit detecting the light in a second channel, and processing circuitry for processing the light detected by the first light receiving unit and the second light receiving unit in the first channel and the second channel, wherein the processing circuit is operative with the first light receiving unit a first amplifier for processing the first signal of the first channel through the first light receiving unit into a second signal of a specified level, operatively connected to the second light receiving unit, and passing through the second light receiving unit A second amplifier for processing the third signal of the second channel as a fourth signal of a specified level, a phase converter for outputting a fifth signal by inverting the phase of the fourth signal output from the second amplifier, and the first and an analog-to-digital (A/D) converter for outputting a specified signal based on the second signal input from the amplifier and the fifth signal opposite in phase to the second signal input from the phase converter
  • A/D analog-to
  • a front-end module of a device for measuring a biosignal using light
  • a first amplifier operatively connected to a first light receiving unit for detecting light and converting and amplifying the first signal of the first channel through the first light receiving unit into a second signal of a specified level
  • a second amplifier operatively connected to a second light receiving unit for detecting the light of a second channel in the second amplifier for converting and amplifying the third signal of the second channel through the second light receiving unit into a fourth signal of a specified level
  • the second signal amplified by the first amplifier and the fourth signal amplified by the second amplifier and a phase converter operatively connected to the second amplifier and inverting the phase of the fourth signal
  • An analog-to-digital (A/D) converter for outputting a specified signal based on the fifth signal whose phase is inverted may be included.
  • a method of operating an electronic device capable of measuring a biosignal includes an operation of detecting a trigger related to sensor data acquisition, and first sensor data for the trigger to provide information related to a first service
  • the operation of performing signal processing to remove the DC component and extract only the AC component based on the first switching control the trigger acquires second sensor data for providing information related to the second service
  • an operation of performing signal processing to extract a DC component and an AC component based on the second switching control may be included.
  • a computer-readable recording medium recording a program for executing the method in a processor may be included.
  • a DC component eg, a DC voltage component
  • a signal having the maximum SNR may be obtained.
  • the gain of the sensor receiving end may be maximally increased due to the removal of the DC component.
  • the DC component is also measured through a switching operation, so that the electronic device provides a service to the user ( Or, it is possible to obtain an optimized biosignal according to the situation).
  • FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure
  • FIG. 2 is a perspective view of a front surface of an electronic device according to an exemplary embodiment.
  • FIG. 3 is a perspective view of a rear surface of an electronic device according to an exemplary embodiment
  • FIG. 4 is a diagram illustrating an example of a sensor module of an electronic device according to various embodiments of the present disclosure
  • FIG. 5 is a diagram illustrating an example of a block configuration of an electronic device according to an embodiment.
  • FIG. 6 is a diagram illustrating an example of configuring a light receiving unit and a front-end module in an electronic device according to an embodiment.
  • FIG. 7 is a diagram illustrating an example of a simulation based on an electronic device according to an embodiment.
  • FIG. 8 is a diagram illustrating another example of configuring a light receiving unit and a front-end module in an electronic device according to an exemplary embodiment.
  • FIG. 9 is a diagram illustrating another example of configuring a light receiving unit and a front-end module in an electronic device according to an exemplary embodiment.
  • FIG. 10 is a diagram illustrating another example of a block configuration of an electronic device according to an embodiment.
  • FIG. 11 is a diagram illustrating an example of configuring a switch in a front-end module in an electronic device according to an embodiment.
  • FIG. 12 is a diagram illustrating an example of a configuration of a switch circuit of a front-end module in an electronic device according to an embodiment.
  • FIG. 13 is a diagram illustrating another example of a configuration of a switch circuit of a front-end module in an electronic device according to an embodiment.
  • FIGS. 14 and 15 are diagrams illustrating an example of a simulation based on an electronic device according to various embodiments of the present disclosure.
  • 16 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure
  • FIG. 1 is a block diagram of an electronic device 101 in a network environment 100 according to various embodiments of the present disclosure.
  • the electronic device 101 communicates with the electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 .
  • a first network 198 eg, a short-range wireless communication network
  • a second network 199 e.g., a second network 199 . It may communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 .
  • the electronic device 101 includes a processor 120 , a memory 130 , an input device 150 , a sound output device 155 , a display device 160 , an audio module 170 , and a sensor module ( 176 , interface 177 , haptic module 179 , camera module 180 , power management module 188 , battery 189 , communication module 190 , subscriber identification module 196 , or antenna module 197 . ) may be included. In some embodiments, at least one of these components (eg, the display device 160 or the camera module 180 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components may be implemented as one integrated circuit. For example, the sensor module 176 (eg, a fingerprint sensor, an iris sensor, or an illuminance sensor) may be implemented while being embedded in the display device 160 (eg, a display).
  • the sensor module 176 eg, a fingerprint sensor, an iris sensor, or an illuminance sensor
  • the processor 120 executes software (eg, the program 140) to execute at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120 . It can control and perform various data processing or operations. According to an embodiment, as at least part of data processing or operation, the processor 120 stores commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) into a volatile memory (volatile memory). ) 132 , may process commands or data stored in the volatile memory 132 , and store the resulting data in a non-volatile memory 134 .
  • software eg, the program 140
  • the processor 120 stores commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) into a volatile memory (volatile memory).
  • volatile memory volatile memory
  • 132 may process commands or data stored in the volatile memory 132 , and store the resulting data in a non-volatile memory 134 .
  • the processor 120 includes a main processor 121 (eg, a central processing unit (CPU) or an application processor (AP)), and a coprocessor that can be operated independently or together with the processor 120 .
  • a main processor 121 eg, a central processing unit (CPU) or an application processor (AP)
  • a coprocessor that can be operated independently or together with the processor 120 .
  • 123 eg, a graphic processing unit (GPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)
  • the auxiliary processor 123 may be configured to use less power than the main processor 121 or to be specialized for a designated function.
  • the auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .
  • the auxiliary processor 123 is, for example, on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is At least one of the components of the electronic device 101 (eg, the display device 160 and the sensor module 176 ) together with the main processor 121 while in an active (eg, application execution) state ), or at least some of functions or states related to the communication module 190).
  • the coprocessor 123 eg, an image signal processor or a communication processor
  • may be implemented as part of another functionally related component eg, the camera module 180 or the communication module 190. have.
  • the memory 130 may store various data used by at least one component of the electronic device 101 (eg, the processor 120 or the sensor module 176 ).
  • the data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto.
  • the memory 130 may include a volatile memory 132 or a non-volatile memory 134 .
  • the program 140 may be stored as software in the memory 130 , and may include, for example, an operating system (OS) 142 , middleware 144 , or an application 146 . .
  • OS operating system
  • middleware middleware
  • application application
  • the input device 150 may receive a command or data to be used by a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 .
  • the input device 150 may include, for example, a microphone, a mouse, a keyboard, or a digital pen (eg, a stylus pen).
  • the sound output device 155 may output a sound signal to the outside of the electronic device 101 .
  • the sound output device 155 may include, for example, a speaker or a receiver.
  • the speaker can be used for general purposes such as multimedia playback or recording playback, and the receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from or as part of the speaker.
  • the display device 160 may visually provide information to the outside (eg, a user) of the electronic device 101 .
  • the display device 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the corresponding device.
  • the display device 160 includes a touch circuitry configured to sense a touch or a sensor circuit configured to measure the intensity of a force generated by the touch (eg, a pressure sensor). may include.
  • the audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input device 150 , or an external electronic device (eg, a sound output device 155 ) connected directly or wirelessly with the electronic device 101 . The sound may be output through the electronic device 102 (eg, a speaker or headphones).
  • an external electronic device eg, a sound output device 155
  • the sound may be output through the electronic device 102 (eg, a speaker or headphones).
  • the sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, user state), and generates an electrical signal or data value corresponding to the sensed state. can do.
  • the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometer sensor, a magnetic sensor, and an acceleration sensor. ), grip sensor, proximity sensor, color sensor (eg, RGB (red, green, blue) sensor), IR (infrared) sensor, biometric sensor, temperature It may include a temperature sensor, a humidity sensor, or an illumination sensor.
  • the interface 177 may support one or more designated protocols that may be used to directly or wirelessly connect to an external electronic device (eg, the electronic device 102 ) of the electronic device 101 .
  • the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface.
  • HDMI high definition multimedia interface
  • USB universal serial bus
  • SD secure digital
  • the connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102 ).
  • the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).
  • the haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense.
  • the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.
  • the camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.
  • the power management module 188 may manage power supplied to the electronic device 101 .
  • the power management module 188 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).
  • PMIC power management integrated circuit
  • the battery 189 may supply power to at least one component of the electronic device 101 .
  • battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.
  • the communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). It can support establishment and communication through the established communication channel.
  • the communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication.
  • the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : It may include a local area network (LAN) communication module, or a power line communication module).
  • a corresponding communication module among these communication modules is a first network 198 (eg, a short-range communication network such as Bluetooth, Wi-Fi direct, or infrared data association (IrDA)) or a second network 199 (eg, a cellular network, the Internet).
  • a computer network eg, a telecommunication network such as a LAN or a wide area network (WAN)
  • These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other.
  • the wireless communication module 192 communicates with the first network 198 or the second network 199 using subscriber information (eg, international mobile subscriber identity (IMSI)) stored in the subscriber identification module 196 .
  • subscriber information eg, international mobile subscriber identity (IMSI)
  • IMSI international mobile subscriber identity
  • the antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device).
  • the antenna module 197 may include one antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern.
  • the antenna module 197 may include a plurality of antennas. In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna.
  • other components eg, RFIC
  • other than the radiator may be additionally formed as a part of the antenna module 197 .
  • peripheral devices eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)
  • GPIO general purpose input and output
  • SPI serial peripheral interface
  • MIPI mobile industry processor interface
  • the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 .
  • Each of the electronic devices 102 and 104 may be the same or a different type of the electronic device 101 .
  • all or part of the operations executed in the electronic device 101 may be executed in one or more of the external electronic devices 102 , 104 , or 108 .
  • the electronic device 101 may perform the function or service itself instead of executing the function or service itself.
  • one or more external electronic devices 102 and 104 may be requested to perform at least a part of a function or a service thereof.
  • the one or more external electronic devices 102 and 104 that have received the request execute at least a part of the requested function or service, or an additional function or service related to the request, and send a result of the execution to the electronic device 101 can transmit
  • the electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request.
  • cloud computing, distributed computing, or client-server computing technology may be used.
  • the electronic device 101 may have various types of devices.
  • the electronic device 101 may include, for example, a portable communication device (eg, a smart phone), a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device.
  • a portable communication device eg, a smart phone
  • portable multimedia device e.g., a portable multimedia device
  • portable medical device e.g., a portable medical device
  • a camera e.g., a camera
  • a wearable device e.g., a smart bracelet
  • a or B at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C” and “A;
  • Each of the phrases such as “at least one of B, or C” may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof.
  • Terms such as “first”, “second”, or “first” or “second” may be used simply to distinguish the component from other such components, and may refer to components in other aspects (e.g., importance or order) is not limited.
  • a reference in which one (e.g. first) component is “coupled” or “connected” to another (e.g. second) component with or without the terms “functionally” or “communicatively” If used, it means that one component can be connected to the other component directly (eg, by wire), wirelessly, or through a third component.
  • module may include a unit implemented in hardware, software or firmware, for example, logic, logic block, component ), or the term “circuit” can be used interchangeably.
  • a module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. According to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • Various embodiments of the present document include one or more stored in a storage medium (eg, the internal memory 136 or the external memory 138) readable by a machine (eg, the electronic device 101). It may be implemented as software (eg, the program 140) including instructions.
  • the processor eg, the processor 120
  • the device may call at least one of one or more instructions stored from a storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the at least one command called.
  • the one or more instructions may include code generated by a compiler or code that may be executed by an interpreter.
  • the device-readable storage medium may be provided in the form of a non-transitory storage medium.
  • 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term refers to the case where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.
  • a signal eg, electromagnetic wave
  • the method according to various embodiments disclosed in this document may be provided as included in a computer program product.
  • Computer program products may be traded between sellers and buyers as commodities.
  • the computer program product is distributed in the form of a machine-readable storage medium (eg CD-ROM, compact disc read only memory), or via an application store (eg Play Store TM ) or on two user devices (eg CD-ROM). : can be distributed (eg, downloaded or uploaded) directly between smartphones) and online.
  • at least a part of the computer program product may be temporarily stored or temporarily created in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.
  • each component eg, a module or a program of the above-described components may include a singular or a plurality of entities.
  • one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added.
  • a plurality of components eg, a module or a program
  • the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. .
  • operations performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations are executed in a different order. , may be omitted, or one or more other operations may be added.
  • FIG. 2 is a perspective view of a front surface of an electronic device according to an exemplary embodiment.
  • 3 is a perspective view of a rear surface of an electronic device according to an exemplary embodiment;
  • an electronic device 101 has a first surface (or front surface) 210A, a second surface (or rear surface) 210B, and a first surface 210A. and a side surface 210C surrounding the space between the second surface 210B, and a housing 210 connected to at least a portion of the housing 210 and configured to attach the electronic device 101 to a user's body part (eg, a wrist). , or ankle) may include fastening members 250 and 260 configured to be detachably attached to the ankle.
  • the housing 210 may refer to a structure that forms part of the first surface 210A, the second surface 210B, and the side surface 210C of FIG. 2 .
  • the first surface 210A may be formed by the front plate 201 (eg, a glass plate including various coating layers or a polymer plate) at least a portion of which is substantially transparent.
  • the front plate 201 eg, a glass plate including various coating layers or a polymer plate
  • the second surface 210B may be formed by the substantially opaque back plate 207 .
  • the back plate 207 may be made of, for example, coated or tinted glass, ceramic, polymer, metal (eg, aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the foregoing. can be formed by
  • the side surface 210C is coupled to the front plate 201 and the rear plate 207 by a side bezel structure (or “side member”) 206 comprising a metal and/or a polymer. can be formed.
  • a side bezel structure or “side member” 206 comprising a metal and/or a polymer.
  • the back plate 207 and the side bezel structure 206 are integrally formed and may include the same material (eg, a metal material such as aluminum).
  • the binding members 250 and 260 may be formed of various materials and shapes.
  • the binding members 250 and 260 may be formed so that the integral and plurality of unit links can flow with each other by a woven fabric, leather, rubber, urethane, metal, ceramic, or a combination of at least two of the above materials. .
  • the electronic device 101 includes the display 220 (eg, the display device 160 of FIG. 1 ), the audio modules 205 and 208 , and the sensor module 211 (eg, the display device 160 of FIG. 1 ). It may include at least one of a sensor module 176 ), key input devices 202 , 203 , 204 , and a connector hole 209 . In some embodiments, the electronic device 101 omits at least one of the components (eg, the key input device 202 , 203 , 204 , the connector hole 209 , or the audio module 205 , 208 ) or Other components may be additionally included.
  • the components eg, the key input device 202 , 203 , 204 , the connector hole 209 , or the audio module 205 , 208 .
  • the display 220 may be exposed through a substantial portion of the front plate 201 , for example.
  • the shape of the display 220 may be a shape corresponding to the shape of the front plate 201 , and may have various shapes such as a circle, an oval, or a polygon.
  • the display 220 may be coupled to or disposed adjacent to a touch sensing circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and/or a fingerprint sensor.
  • the audio modules 205 and 208 may include a microphone hole 205 and a speaker hole 208 .
  • a microphone for acquiring an external sound may be disposed therein, and in some embodiments, a plurality of microphones may be disposed to detect the direction of the sound.
  • the speaker hole 208 may be used as an external speaker and/or a receiver for calls.
  • the speaker hole 208 and the microphone hole 205 may be implemented as a single hole, or a speaker may be included without the speaker hole 208 (eg, a piezo speaker).
  • the sensor module 211 may generate an electrical signal or data value corresponding to an internal operating state of the electronic device 101 or an external environmental state.
  • the sensor module 211 may include, for example, a biometric sensor module (eg, a heart rate measurement (HRM) sensor, a photoplethysmography (PPG) sensor) disposed on the second surface 210B of the housing 210 . have.
  • HRM heart rate measurement
  • PPG photoplethysmography
  • the electronic device 101 may include a sensor module not shown, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, It may further include at least one of a humidity sensor and an illuminance sensor.
  • a sensor module not shown, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, It may further include at least one of a humidity sensor and an illuminance sensor.
  • the key input device 202 , 203 , 204 includes a wheel key 202 disposed on a first surface 210A of the housing 210 and rotatable in at least one direction, and/or a side surface 210C of the housing 210 . ) may include side key buttons 202 and 203 disposed in the .
  • the wheel key 202 may have a shape corresponding to the shape of the front plate 202 .
  • the electronic device 101 may not include some or all of the above-mentioned key input devices 202, 203, 204 and the non-included key input devices 202, 203, 204 display a display. It may be implemented in other forms, such as soft keys on 220 .
  • the connector hole 209 may accommodate a connector (eg, a USB connector) for transmitting/receiving power and/or data to/from an external electronic device, and another connector capable of receiving a connector for transmitting/receiving an audio signal to/from an external electronic device connector hole (not shown)).
  • the electronic device 101 may further include, for example, a connector cover (not shown) that covers at least a portion of the connector hole 209 and blocks the inflow of foreign substances into the connector hole 209 .
  • the binding members 250 and 260 may be detachably attached to at least a partial region of the housing 210 using the locking members 251 and 261 .
  • the binding members 250 and 260 may include one or more of a fixing member 252 , a fixing member fastening hole 253 , a band guide member 254 , and a band fixing ring 255 .
  • the fixing member 252 may be configured to fix the housing 210 and the binding members 250 and 260 to a part of the user's body (eg, a wrist or an ankle).
  • the fixing member coupling hole 253 may correspond to the fixing member 252 to fix the housing 210 and the coupling members 250 and 260 to a part of the user's body.
  • the band guide member 254 is configured to limit the range of motion of the fixing member 252 when the fixing member 252 is fastened with the fixing member coupling hole 253, so that the fixing members 250 and 260 are attached to a part of the user's body. It can be made to adhere and bind.
  • the band fixing ring 255 may limit the range of movement of the fixing members 250 and 260 in a state in which the fixing member 252 and the fixing member coupling hole 253 are fastened.
  • the electronic device 101 may further include components not shown.
  • the electronic device 101 may include an antenna, a support member (eg, a bracket), a battery, a printed circuit board, and/or a sealing member.
  • the support member may be formed of, for example, a metallic material and/or a non-metallic (eg, polymer) material.
  • the support member may have a display 220 coupled to one surface and a printed circuit board coupled to the other surface.
  • the printed circuit board may be equipped with a processor (eg, processor 120 in FIG. 1 ), memory (eg, memory 130 in FIG. 1 ), and/or an interface (eg, interface 177 in FIG. 1 ). have.
  • the processor is, for example, a micro controller unit (MCU), a central processing unit (CPU), a graphic processing unit (GPU), a sensor processor, an application processor (AP), or communication It may include one or more of a communication processor (CP).
  • MCU micro controller unit
  • CPU central processing unit
  • GPU graphic processing unit
  • AP application processor
  • CP communication processor
  • Memory may include, for example, volatile memory or non-volatile memory.
  • the interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface.
  • HDMI high definition multimedia interface
  • USB universal serial bus
  • the interface may, for example, electrically or physically connect the electronic device 101 to an external electronic device, and may include a USB connector, an SD card/MMC connector, or an audio connector.
  • the battery is a device for supplying power to at least one component of the electronic device 101 , and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery may be disposed substantially coplanar with the printed circuit board, for example.
  • the battery may be integrally disposed inside the electronic device 101 or may be detachably disposed with the electronic device 101 .
  • the antenna may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna.
  • the antenna may, for example, perform short-range communication with an external electronic device or wirelessly transmit/receive power required for charging, and may transmit a short-range communication signal or a magnetic-based signal including payment data.
  • the sealing member may be configured to block moisture and foreign substances from flowing into a space surrounded by the side bezel structure and the rear plate from the outside.
  • FIG. 4 is a diagram illustrating an example of a sensor module of an electronic device according to various embodiments of the present disclosure
  • FIG. 4 may show, for example, an example in which the sensor module 211 is disposed on the second surface 210B of the housing 210 of the electronic device 101 .
  • the sensor module 211 represents an example of a structure of an optical sensor (eg, a PPG sensor) including an emitter 410 and a receiver 420 .
  • an optical sensor eg, a PPG sensor
  • the light emitting unit 410 may include a light emitting device (or semiconductor) such as a light emitting diode (eg, LED, light-emitting diode).
  • the light receiving unit 420 includes a light receiving element (or semiconductor) that converts light energy (or light) such as a photodiode (PD) (or photodiode) into electrical energy (or electrical signal). can do.
  • the sensor module 211 includes one light emitting unit 410 and eight light receiving units 420 as an example, but various embodiments are not limited thereto.
  • the light emitting unit 410 may be disposed in the center, and the light receiving unit 420 may include a plurality of photodiodes and surround the light emitting unit 410 .
  • the eight light receiving units 420 may be configured to form at least two channels (or electrical paths) (eg, a first channel and a second channel) according to the design of the sensor module 211 .
  • the light receiving unit 420 may be divided into two groups (eg, a first group and a second group) according to two channels.
  • the light receiving unit 420 is divided into a first group formed of one or more PDs and a second group formed of the remaining PDs, and operates to receive light through a corresponding channel according to the divided group.
  • the light receiving unit 420 may include a plurality of PDs, some of the plurality of PDs may be set as a first group to form a first channel, and the remaining part may be set as a first group for removing a DC component.
  • the second group can be set to form two channels.
  • Various embodiments are not limited thereto, and in some embodiments may be configured to form three or more channels, such as a first channel, a second channel, and a third channel.
  • the light receiving unit 420 may configure the same number of PDs in the first group and the second group, or may configure the number of PDs in the first group and the second group differently. For example, by configuring each of the first group and the second group with four PDs, the number of PDs in each channel may be identically configured. As another example, the first group may be composed of two PDs, and the second group may be composed of six PDs, so that the number of PDs in each channel may be configured differently. According to an embodiment, when the number of PDs in each channel is different from each other, a direct current (DC) level in each channel may be corrected using a gain of an amplifier.
  • DC direct current
  • FIG. 5 is a diagram illustrating an example of a block configuration of an electronic device according to an embodiment.
  • FIG. 5 may show an example of a block configuration related to a sensor module for sensing biometric data in the electronic device 101 according to various embodiments of the present disclosure.
  • the block configuration of the electronic device 101 according to the example of FIG. 5 is the electronic device 101 itself (eg, a sensor (eg, a light sensor) or a sensor module) or within the electronic device 101 . It may correspond to the configuration of the provided sensor module.
  • the electronic device 101 may include a sensing unit and a processing unit.
  • the sensing unit may be divided into a sensor block and a control block.
  • the sensor block serves to receive biosignals measured from the body (eg, sensing operation)
  • the control block serves to digitize the analog signals received from the sensor block (eg, signal conversion and/or or processing).
  • the sensing unit may include a light emitting unit 510 , a plurality of light receiving units 521 and 523 , and a front-end module 530 (eg, analog front-end (AFE)).
  • the processing unit may include a processor 570 (eg, the processor 120 of FIG. 1 ).
  • the configuration of the electronic device 101 is not limited thereto, and may include various blocks and/or circuits for providing services (or functions) based on bio-signal measurement.
  • the components listed in the example of FIG. 5 may be operatively and/or electrically connected to each other.
  • the biosignal that can be measured by the electronic device 101 using a sensor may include, for example, blood pressure/heart rate measurement (HRM), heart rate variability (HRV), and light. plethysmography (PPG), electrocardiograms (ECG), and/or peripheral oxygen saturation (SpO 2 ).
  • the light emitting unit 510 may be implemented as a light emitting device (or semiconductor) such as a light emitting diode (eg, LED, light-emitting diode), and may emit a specified light (eg, LED light).
  • a light emitting device or semiconductor
  • a light emitting diode eg, LED, light-emitting diode
  • a specified light eg, LED light
  • the light receiving units 521 and 523 are light receiving elements (or semiconductors) that convert light energy (or light) such as photodiodes (PDs) (or photodiodes) into electrical energy (or electrical signals). may include.
  • the light receiving units 521 and 523 may include a first light receiving unit 521 for a first channel (eg, an electrical path) and a second light receiving unit 523 for a second channel. have.
  • each of the first light receiving unit 521 and the second light receiving unit 523 may include one or more photodiodes.
  • the number of photodiodes of the first light receiving unit 521 of the first channel and the number of photodiodes of the second light receiving unit 523 of the second channel may be the same or different from each other.
  • the light receiving units 521 and 523 are output (or emitted) from the light emitting unit 510 and transmitted to a specific object (eg, user's skin) to receive reflected light (eg, LED light) (or signal). It can detect (or receive).
  • the light receiving units 521 and 523 may convert a detected signal (eg, light) into an electrical signal and transmit it to the front-end module 530 based on a corresponding channel.
  • the front-end module 530 receives an electrical signal (eg, a first signal, a second signal) for each channel from the light receiving units 521 and 523 , and processes the signal based on the corresponding channel to process the signal. You can pass it to (570).
  • the front-end module 530 may perform a sensing function (eg, measurement of a biological signal) based on an electrical signal (eg, a biological signal) received from the light receiving units 521 and 523 .
  • the front-end module 530 processes (eg, removes or includes a DC component) a sensed signal (eg, alternative current (AC) + direct current (DC)) and transmits it to the processor 570 .
  • a sensing function eg, measurement of a biological signal
  • the front-end module 530 processes (eg, removes or includes a DC component) a sensed signal (eg, alternative current (AC) + direct current (DC)) and transmits it to the processor 570 .
  • AC alternative current
  • the front-end module 530 may perform a pre-processing operation on an intermediate frequency signal (IF) prior to processing by the processor 570 .
  • the front-end module 530 may include amplifiers 541 , 543 , a phase converter 550 , and an analog-to-digital (A/D) converter 560 .
  • the configuration of the front-end module 530 is not limited thereto, and may include various blocks and/or circuits for appropriate processing by the processor 570 .
  • the amplifiers 541 and 543 may include an operational amplifier such as a trans-impedance amplifier (TIA).
  • the amplifiers 541 and 543 may include a first TIA 541 for the first channel and a second TIA 543 for the second channel.
  • the first TIA 541 of the first channel and the second TIA 543 of the second channel are operatively and/or electrically connected to the light receiving units 521 and 523 of the corresponding channel, respectively, and , the current transmitted from the light receiving units 521 and 523 may be converted into a voltage and amplified.
  • the first TIA 541 may be connected to the first light receiving unit 521 of the first channel, convert a first current according to the first channel into a first voltage, and provide an amplified first signal.
  • the second TIA 543 may be connected to the second light receiving unit 523 of the second channel, convert a second current according to the second channel into a second voltage, and provide an amplified second signal.
  • the first signal (eg, DC+AC) of the first light receiving unit 521 according to the first channel may be transmitted to the A/D converter 560 through the first TIA 541 .
  • the second signal (eg, DC+AC) of the second light receiving unit 523 according to the second channel is converted into a third signal (eg, DC-AC) processed through the phase converter 550 . and may be transmitted to the A/D converter 560 .
  • the phase converter 550 inverts (or 180 degrees phase) the second signal (eg, DC+AC) to remove the DC component (extract only the AC component) from the A/D converter 560 . It may serve to generate a third signal (eg, DC-AC) by performing a phase shift.
  • the phase converter 550 may include an inverting amplifier 551 and a filter 553 .
  • the configuration of the phase converter 550 is not limited thereto, and may include various blocks and/or circuits for inverting a given signal for proper processing by the A/D converter 560 .
  • the inverting amplifier 551 is operatively and/or electrically coupled with the second TIA 543 of the second channel to provide a second signal from the second TIA 543 to a given reference potential point. It can serve as a reversal based on According to an embodiment, the inverting amplifier 551 may invert and output the signal by a predetermined amplification degree with respect to the input signal. For example, the inverting amplifier 551 may amplify a negative (-) voltage as a positive (+) voltage and a positive voltage as a negative voltage while maintaining the shape of the signal.
  • the inverting amplifier 551 may include a first input port (eg, an inverting terminal (-)), a second input port (eg, a non-inverting terminal (+)), and one output port. have. According to an embodiment, the inverting amplifier 551 may invert the second signal into the third signal based on the reference potential applied to (or input) to the second input port.
  • a first input port eg, an inverting terminal (-)
  • a second input port eg, a non-inverting terminal (+)
  • the inverting amplifier 551 may invert the second signal into the third signal based on the reference potential applied to (or input) to the second input port.
  • the filter 553 may provide a reference potential for inverting the second signal of the second TIA 543 to DC to the inverting amplifier 551 as a center for inverting the second signal of the inverting amplifier 551 .
  • the filter 553 may include a low pass filter (LPF).
  • the filter 553 is between the second TIA 543 and the inverting amplifier 551, one end is connected to the second TIA 543, and the other end is an inverting amplifier 551 (eg, an inverting amplifier).
  • the second input port of 551) may be formed to be connected.
  • the filter 553 may serve to determine a reference electric potential for a signal (eg, a third signal) inverted through the inverting amplifier 551 .
  • the filter 553 extracts (or filters) a specified signal (eg, a DC component) from the signal (eg, the second signal) of the second TIA 543 of the second channel to reverse the second signal. It may be provided to the inverting amplifier 551 as a reference signal (or reference value) for
  • the A/D converter 560 is operatively and/or electrically connected to the first TIA 541 of the first channel and the inverting amplifier 551 of the second channel to signal (eg, the second It may serve to digitize the difference between the first signal and the third signal).
  • the A/D converter 560 receives an analog (waveform) signal (eg, a first signal) from the first TIA 541 of the first channel and the inverting amplifier 551 of the second channel.
  • a fourth signal eg, an AC component from which a DC component is removed
  • a difference between the received analog (waveform) signals eg, a third signal
  • the first signal (eg, DC+AC) of the first channel and the third signal (eg, DC-AC) of the second channel having opposite phases are differential of the A/D converter 560 .
  • a first signal and a third signal having opposite phases are respectively input to the two input ports of the A/D converter 560 , and the A/D converter 560 receives DC from the first signal and the third signal.
  • the component can be removed and only the AC component can be output.
  • the processor 570 may serve to control the configuration of the electronic device 101 .
  • the processor 570 may perform various operations based on an output signal of the front-end module 530 .
  • the processor 570 calculates information (eg, health information) about the corresponding biosignal using the biosignal (eg, HRM, HRV, ECG, PPG, and/or SpO 2 ) to the user.
  • information eg, health information
  • the biosignal eg, HRM, HRV, ECG, PPG, and/or SpO 2
  • FIG. 6 is a diagram illustrating an example of configuring a light receiving unit and a front-end module in an electronic device according to an embodiment.
  • FIG. 6 is a block diagram and/or circuit of the light receiving units 521 and 523 and the front-end module 530 corresponding to FIG. 5 in the electronic device 101 according to various embodiments of the present disclosure.
  • FIG. 6 may show an example of the structure of the receiving end of the sensor module for efficiently removing the DC component generated at the receiving end of the optical sensor.
  • the components listed in the example of FIG. 6 may be operatively and/or electrically connected to each other.
  • the receiving end of the electronic device 101 uses a plurality of photodiodes 521 and 523 (eg, PD1 521 , PD2 523 ).
  • the electronic device 101 is divided into two channels (eg, a first channel and a second channel), and a photodiode (eg, PD1) which is a light receiving element for the first light receiving unit 521 of the first channel and a photodiode (eg, PD2) serving as a light receiving element for the second light receiving unit 523 of the second channel.
  • the first light receiving unit 521 and the second light receiving unit 523 may each include a plurality of photodiodes, and may include the same or different number of photodiodes in each channel.
  • the electronic device 101 is operatively and/or electrically connected to each of the light receiving units 521 and 523 divided into two channels, and processes the signals of each of the light receiving units 521 and 523 (eg: It may include amplifiers 541 and 543 (eg, first TIA 541 and second TIA 543 ) for converting and amplifying).
  • the amplifiers 541 and 543 may include a first TIA 541 that processes the signal of the first light receiving unit 521 of the first channel and a second second that processes the signal of the second light receiving unit 523 of the second channel.
  • TIA 543 may be included.
  • the amplifiers 541 and 543 may use an operational amplifier and may include devices (eg, resistors and capacitors) for stable operation.
  • the first signal 610 processed through the first TIA 541 of the first channel may be input to the first input terminal (or port) (+) of the A/D converter 560 . have.
  • the second signal 620 processed through the second TIA 543 of the second channel may be input to the phase converter 550 .
  • the phase converter 550 is the second in the inverting amplifier 551 and the inverting amplifier 551 that inverts the second signal 620 of the second TIA 543 of the second channel to have a phase difference of 180 degrees.
  • a filter 553 that provides a reference signal (or reference potential) for setting an inversion center capable of removing the DC component of the signal 620 as the DC component may be included.
  • the inverting amplifier 551 may use an operational amplifier and may include a device (eg, a resistor) for stable operation.
  • the filter 553 may use an LPF.
  • the second signal 620 may be used as an input of the inverting amplifier 551 and the filter 553 (eg, LPF) of the phase converter 550 .
  • the filter 553 eg, LPF
  • the inverting amplifier 551 may include a first input port (eg, an inverting terminal (-)), a second input port (eg, a non-inverting terminal (+)), and one output port. have.
  • the inverting amplifier 551 may invert the second signal 620 into the third signal 630 based on the reference potential applied to (or input) to the second input port.
  • a reference potential (eg, ⁇ (DC)) of the filter 553 may be input to the second input port of the inverting amplifier 551 according to an electrical path with the filter 553 .
  • the reference potential passing through the filter 553 may include a DC component (eg, ⁇ (DC)) of a specific voltage.
  • the inverting amplifier 551 has a first input port (eg, an inverting terminal (-)) operatively and/or electrically connected to a second TIA 543 of a second channel, and a second An input port (eg, a non-inverting terminal (+)) may be operatively and/or electrically connected to the filter 553 .
  • the inverting amplifier 551 substantially inverts the AC component in the second signal 620 from the second TIA 543 when the reference potential of the filter 553 is input to the second input port. to output the third signal 630 .
  • the second signal 620 (eg, ⁇ (DC+AC)) input to the first input port and the second input Based on the first reference potential (eg, ⁇ (DC)) input to the port, the second signal 620 is shifted (or floated) from the ground by a certain range instead of the ground reference (eg, the second signal ( (corresponding to the input DC component of 1220)).
  • the inverting amplifier 551 may amplify and invert a voltage between two points that are not based on the ground by a predetermined amplification and output the amplified voltage.
  • the inverting amplifier 551 may amplify a signal that does not change according to a ground reference (or a signal floating on the ground), and may be defined as in [Equation 1] below.
  • the filter 553 is formed between the second TIA 543 and the inverting amplifier 551 to set the center for inversion of the second signal 620 in the inverting amplifier 551 to DC.
  • a reference potential for this may be provided to the inverting amplifier 551 .
  • the filter 553 applies a reference potential (eg, ⁇ (DC)) for a signal (eg, the third signal 630) inverted through the inverting amplifier 551 to the inverting amplifier 551 . can be entered.
  • the filter 553 generates a reference signal (or reference signal) (eg, ⁇ (DC)) based on the second signal 620 (eg, output voltage) of the second TIA 543 . can do.
  • the inverting amplifier 551 inverts the phase of the second signal 620 based on a reference potential point (eg, a voltage based on the reference potential point) according to the reference potential provided from the filter 553 to thereby invert the third signal 630 . ) can be printed.
  • the third signal 630 processed through the inverting amplifier 551 may be input to the second input terminal (or port) ( ⁇ ) of the A/D converter 560 .
  • two signals having opposite phases are, for example, the first signal 610 of the first channel and the third signal 630 of the second channel are differential ( differential) input.
  • the first signal 610 and the third signal 630 having opposite phases are differentially input to the two input ports of the A/D converter 560, respectively, and the A/D converter 560 is the first A DC component common to the signal 610 and the third signal 630 may be removed, and only the AC component may be output.
  • the A/D converter 560 of the amplifiers 541 and 543 to the difference '2AC' between (DC+AC) of the first signal 610 and (DC-AC) of the third signal 630 .
  • a fourth signal 640 '2 ⁇ (AC)' multiplied by a gain constant ' ⁇ ' (eg, ⁇ x2AC) may be obtained.
  • FIG. 7 is a diagram illustrating an example of a simulation based on an electronic device according to an embodiment.
  • FIG. 7 may represent, for example, a graph showing a simulation result based on the circuit of FIG. 6 .
  • the x-axis may represent time(s)
  • the y-axis may represent a DC component.
  • the example shown in FIG. 7 takes the reference values of two TIAs 541 and 543 , one inverting amplifier 551 , and an inverting amplifier 551 , as illustrated in FIG. 6 .
  • An example of a simulation result based on a circuit composed of a filter 553 for periodicity can be shown.
  • Example 701 of FIG. 7 may represent a current (eg, a PD output current) output from each of the light receiving units 521 and 523 .
  • a current eg, a PD output current
  • the outputs of the first light receiving unit 521 (eg, PD1) and the second light receiving unit 523 (eg, PD2) are triangular waves of about 2 Hz, and the magnitude of DC
  • ? is set to about 5uA
  • the size of AC is set to about 10nApp
  • the gain ⁇ of the first TIA 541 and the second TIA 543 is about 25000.
  • the magnitude of DC may represent about 125 mV
  • the magnitude of AC may represent about 0.24 mV.
  • the magnitude of DC may be about 125 mV
  • the magnitude of AC may indicate 0.24 mV.
  • Example 707 of FIG. 7 shows that the output (eg, the second signal) of the second TIA 543 is inverted (eg, phase shifted by 180 degrees) based on the DC magnitude of about 125 mV (eg, of the inverting amplifier 551 )
  • an output of the inverting amplifier 551 eg, a third signal 630
  • ) may be the same as the inverted output (eg, -second signal) of the second TIA 543 .
  • comparing the outputs (eg, the second signal 620 and the third signal 630 ) of Example 705 and Example 707 of FIG. It can be confirmed that it has a phase (eg, a phase difference of 180 degrees).
  • DC is removed from the output of the A/D converter 560 (eg, the fourth signal 640 ) to a nearly non-existent level (eg, the fourth signal 640 ). : about -161 nV), and it can be seen that the magnitude of AC is about 0.48 mV.
  • the processor 570 may acquire a more accurate biosignal (eg, a PPG signal) based on a fourth signal (eg, an AC component) output through the A/D converter 560, More accurate sensing information may be provided to the user by using the obtained bio-signals. For example, the processor 570 may calculate the actual PPG based on the AC component from which the DC component is removed.
  • a more accurate biosignal eg, a PPG signal
  • a fourth signal eg, an AC component
  • FIG. 8 is a diagram illustrating another example of configuring a light receiving unit and a front-end module in an electronic device according to an exemplary embodiment.
  • FIG. 8 is a block constituting the light receiving units 821 and 823 and the front-end module 530 corresponding to FIGS. 5 and/or 6 in the electronic device 101 according to various embodiments of the present disclosure. and/or other examples of circuits.
  • FIG. 8 another example of the structure of the receiving end of the sensor module for efficiently removing the DC component generated at the receiving end of the optical sensor may be shown.
  • FIG. 8 an example of the structure of the receiving end may be shown when each light receiving unit of each channel includes a plurality of photodiodes and the number of photodiodes between channels is different from each other.
  • FIG. 8 shows a plurality of photodiodes 821 and 823 (eg, PD1 to PD6 821 , PD7 for each channel (eg, a first channel and a second channel) at the receiving end of the electronic device 101 ). It may be a structure using ⁇ PD8(823)). According to an embodiment, in FIG. 8 , eight photodiodes for the light receiving unit may be included, and the eight photodiodes may be divided into different numbers for each channel (or grouped) and operated.
  • the electronic device 101 is divided into two channels (eg, a first channel and a second channel), and a plurality of photodiodes (eg, PD1 to PD6 ) for the first light receiving unit 821 of the first channel ) and a plurality of photodiodes (eg, PD7 and PD8) for the second light receiving unit 823 of the second channel.
  • a plurality of photodiodes eg, PD1 to PD6
  • a plurality of photodiodes eg, PD7 and PD8
  • the electronic device 101 may include a sensing unit and a processing unit as described in the description with reference to FIG. 5 .
  • the sensing unit may be divided into a sensor block and a control block.
  • the sensor block serves to receive biosignals measured by the body (eg, sensing operation)
  • the control block serves to digitize the analog signals received by the sensor block (eg, signal conversion and/or processing) can do.
  • the sensing unit may include a light emitting unit 510 , a plurality of light receiving units 821 and 823 , and a front-end module 530 (eg, AFE).
  • the processing unit may include a processor 570 (eg, the processor 120 of FIG. 1 ).
  • the configuration of the electronic device 101 is not limited thereto, and various blocks for providing a service (or function) by measurement of a biosignal (eg, HRM, HRV, ECG, PPG, and/or SpO 2 signal) and / or circuitry.
  • a biosignal eg, HRM, HRV, ECG, PPG, and/or SpO 2 signal
  • the components listed above may be operatively or electrically connected to each other, and the light receiving units 821 and 823 and each operational amplifier (eg, the first TIA 541 , the second TIA 543 , Components and operations other than the output of the inverting amplifier 551 ) may correspond to the components described in the description with reference to FIGS. 5 and 6 , and thus a detailed description thereof will be omitted.
  • the electronic device 101 includes a plurality of photodiodes for each of the first light receiving unit 821 of the first channel and the second light receiving unit 823 of the second channel, and each of the light receiving units 821 and 823 .
  • of photodiodes may be operatively and/or electrically connected to each other (eg, connected in parallel).
  • the output signal of each of the light receiving units (821, 823) is an amplifier (541, 543) operatively and/or electrically connected to each of the light receiving units (821, 823) (eg, a first TIA 541); It may be input to the second TIA 543 ).
  • the number of photodiodes of the light receiving units 821 and 823 corresponding to each channel may be the same, or the number of photodiodes may be different from each other.
  • the first light receiving unit 821 composed of six photodiodes of the first channel (eg, PD1, PD2, PD3, PD4, PD5, PD6) and two photodiodes of the second channel
  • the second light receiving unit 823 configured (eg, PD7, PD8).
  • the configuration of the electronic device 101 is not limited thereto, and the number of photodiodes of the first channel and the second channel may be variously implemented.
  • the first light receiving unit 821 of the first channel converts a signal detected based on six photodiodes into an electrical signal (or an analog signal), and the converted signal (eg, 6 (DC+AC) )) may be output to the first TIA 541 of the first channel.
  • the second light receiving unit 823 of the second channel converts a signal detected based on two photodiodes into an electrical signal (or analog signal), and the converted signal (eg, 2 (DC+AC) )), may be output to the second TIA 543 of the second channel.
  • the analog signal output from the light receiving units 821 and 823 of each channel is a coefficient (eg, '6', '2') (or a constant factor) corresponding to the number of each photodiode of the corresponding channel. can be multiplied by
  • the The gains of the first TIA 541 and/or the second TIA 543 of the second channel may be adjusted to be different so that the DC level of each channel is the same.
  • the gain of the first TIA 541 of the first channel and the gain of the second TIA 543 of the second channel may be set differently.
  • a gain of a corresponding TIA may be set based on the number of photodiodes allocated to each channel (eg, in inverse proportion). For example, referring to FIG.
  • the first signal 810 processed through the first TIA 541 of the first channel may be input to the first input terminal (or port) (+) of the A/D converter 560 . have.
  • an analog signal eg, 2 (DC+AC)
  • the second signal 820 or the second output
  • OUT2 6 ⁇ (DC+AC)
  • '6 ⁇ ' is the number of PDs 2 x gain 3 ⁇
  • 3 ⁇ is the (voltage) of the second TIA 543 gain
  • the second signal 820 processed through the second TIA 543 of the second channel may be input to the phase converter 550 .
  • the phase shifter 550 is an inverting amplifier 551 for inverting the second signal 820 of the second TIA 543 of the second channel to have a 180 degree phase difference with the first signal 810 . and a filter 553 (eg, LPF) for providing a reference signal of the inverting amplifier 551 .
  • the third signal 830 processed through the phase converter 550 may be input to the second input terminal (or port) ( ⁇ ) of the A/D converter 560 .
  • two signals having opposite phases are, for example, the first signal 810 of the first channel and the third signal 830 of the second channel are differential inputs of the A/D converter 560 .
  • the first signal 810 of the first channel and the third signal 830 of the second channel are differential inputs of the A/D converter 560 .
  • the first signal 810 and the third signal 830 having opposite phases are differentially input to the two input ports of the A/D converter 560, respectively, and the A/D converter 560 is the first A DC component common to the signal 810 and the third signal 830 may be removed, and only the AC component may be output.
  • the A/D converter 560 calculates the difference '2AC' between (DC+AC) of the first signal 810 and (DC-AC) of the third signal 830 to the gain constant '6 ⁇ ' of the amplifier.
  • a fourth signal 840 '12 ⁇ (AC)' multiplied by (eg, 6 ⁇ x2AC) may be obtained.
  • FIG. 9 is a diagram illustrating another example of configuring a light receiving unit and a front-end module in an electronic device according to an exemplary embodiment.
  • FIG. 9 is a block constituting the light receiving units 921 and 923 and the front-end module 530 corresponding to FIGS. 5 and/or 6 in the electronic device 101 according to various embodiments of the present disclosure. and/or other examples of circuits.
  • FIG. 9 another example of the structure of the receiving end of the sensor module for efficiently removing the DC component generated at the receiving end of the optical sensor may be shown.
  • FIG. 9 an example of the structure of the receiving end may be shown when each light receiving unit of each channel includes a plurality of photodiodes and the number of photodiodes between channels is the same.
  • FIG. 9 shows a plurality of photodiodes 921 and 923 (eg, PD1 to PD4 921 , PD5 ) for each channel (eg, a first channel and a second channel) at the receiving end of the electronic device 101 .
  • ⁇ PD8(923) may be used.
  • eight photodiodes for the light receiving unit may be included, and the eight photodiodes may be divided (or grouped) in the same number for each channel and operated.
  • the electronic device 101 is divided into two channels (eg, a first channel and a second channel), and a plurality of photodiodes (eg, PD1 to PD4 ) for the first light receiving unit 921 of the first channel ) and a plurality of photodiodes (eg, PD5 to PD8) for the second light receiving unit 923 of the second channel.
  • a plurality of photodiodes eg, PD1 to PD4
  • a plurality of photodiodes eg, PD5 to PD8
  • FIG. 9 other components except for the output of the light receiving units 921 and 923 and each operational amplifier (eg, the first TIA 541, the second TIA 543, and the inverting amplifier 551), and Since the operation may correspond to the components described in the description with reference to FIG. 8 , a detailed description thereof will be omitted.
  • the electronic device 101 includes a plurality of photodiodes for each of the first light receiving unit 921 of the first channel and the second light receiving unit 923 of the second channel, and each of the light receiving units 921 and 923 .
  • of photodiodes may be operatively and/or electrically connected to each other (eg, connected in parallel).
  • the output signal of each light receiving unit 921, 923 is an amplifier 541, 543 (eg, a first TIA 541) operatively and/or electrically connected to each of the light receiving units 921 and 923; It may be input to the second TIA 543 ).
  • the number of photodiodes of the light receiving units 921 and 923 corresponding to each channel may be the same, or the number of photodiodes may be different from each other.
  • the first light receiving unit 921 composed of four photodiodes (eg, PD1, PD2, PD3, and PD4) of the first channel and four photodiodes of the second channel (eg, PD5) , PD6, PD7, and PD8), an example in which the number of photodiodes of each channel is identically configured may be shown.
  • the configuration of the electronic device 101 is not limited thereto, and the number of photodiodes of the first channel and the second channel may be variously implemented.
  • the first light receiving unit 921 of the first channel converts a signal detected based on four photodiodes into an electrical signal (or analog signal), and the converted signal (eg, 4 (DC+AC) )) may be output to the first TIA 541 of the first channel.
  • the second light receiving unit 923 of the second channel converts a signal detected based on four photodiodes into an electrical signal (or analog signal), and the converted signal (eg, 4 (DC+AC) )), may be output to the second TIA 543 of the second channel.
  • the analog signal output from the light receiving units 921 and 923 of each channel may be multiplied by a coefficient (eg, '4') (or a constant factor) corresponding to the number of each photodiode of the corresponding channel. have.
  • the first channel when the number of photodiodes of the light receiving units 921 and 923 corresponding to each channel is the same (eg, Ch1: 4, Ch2: 4), the first channel
  • the gains of the first TIA 541 and/or the second TIA 543 of the second channel may be equally adjusted so that the DC level of each channel is the same.
  • the gain of the first TIA 541 of the first channel and the gain of the second TIA 543 of the second channel may be set to be the same.
  • a gain of a corresponding TIA may be set based on the number of photodiodes allocated to each channel. For example, referring to FIG.
  • the gain of the first TIA 541 and the gain of the second TIA 543 may correspond to about 1 times (eg, Ch1: 4 PDs / Ch2: 4 PDs).
  • the DC level in each channel may be corrected using a gain of an amplifier (eg, the first TIA 541 and/or the second TIA 543 ).
  • the first signal 910 processed through the first TIA 541 of the first channel may be input to the first input terminal (or port) (+) of the A/D converter 560 . have.
  • the second signal 920 processed through the second TIA 543 of the second channel may be input to the phase converter 550 .
  • the phase shifter 550 is an inverting amplifier 551 for inverting the second signal 920 of the second TIA 543 of the second channel to have a 180 degree phase difference with the first signal 910 . and a filter 553 (eg, LPF) for providing a reference signal of the inverting amplifier 551 .
  • the third signal 930 processed through the phase converter 550 may be input to the second input terminal (or port) ( ⁇ ) of the A/D converter 560 .
  • two signals having opposite phases are, for example, the first signal 910 of the first channel and the third signal 930 of the second channel are differential inputs of the A/D converter 560 .
  • the first signal 910 of the first channel and the third signal 930 of the second channel are differential inputs of the A/D converter 560 .
  • the first signal 910 and the third signal 930 having opposite phases are differentially input to the two input ports of the A/D converter 560, respectively, and the A/D converter 560 is the first A DC component common to the signal 910 and the third signal 930 may be removed, and only an AC component may be output.
  • the A/D converter 560 calculates the difference '2AC' between (DC+AC) of the first signal 910 and (DC-AC) of the third signal 930 to the gain constant '4 ⁇ ' of the amplifier.
  • a fourth signal 940 multiplied by (eg, 4 ⁇ x2AC) '8 ⁇ (AC)' may be obtained.
  • the DC component may be removed without additional noise generated while removing the DC component from the conventional sensor.
  • SNR signal-to-noise
  • the number of electronic devices 101 providing a function of measuring the oxygen saturation (SpO 2 ) in a part of the body (eg, the wrist) has recently increased.
  • the oxygen saturation may be defined as in the following [Equation 2].
  • the oxygen saturation may include a red LED and an infrared LED in the light emitting unit (eg, the light emitting unit 510 of FIG. 5 ) of the sensor, and the light receiving unit (eg, the light receiving unit of FIG. 5 ) ( 521, 523)) can be measured with a photodiode.
  • the signal measured by the sensor unit may be composed of an AC component and a DC component.
  • oxygen saturation may approach almost 100%, but in other cases, the value may decrease. .
  • the DC component may also be one piece of information, and the DC component needs to be considered together when measuring oxygen saturation.
  • the DC level may be measured together by including a switch (or switch circuitry) in the structure of the receiving end proposed as described above.
  • PPG and SpO 2 may be simultaneously measured.
  • the electronic device 101 may operate as a circuit that extracts only AC from a signal including a DC component and an AC component when measuring PPG, and when measuring SpO 2 It can operate as a circuit for extracting DC and AC components.
  • a structure of a receiving end is variable, and an optimized signal suitable for a situation can be obtained and provided .
  • FIG. 10 is a diagram illustrating another example of a block configuration of an electronic device according to an embodiment.
  • FIG. 10 may show another example of a block configuration related to a sensor module for sensing biometric data in the electronic device 101 according to various embodiments of the present disclosure.
  • components and operations other than the configuration of the phase converter 1050 for the switching structure are described in the description with reference to FIG. 5 . Since it may correspond to the components as described above, a detailed description thereof will be omitted.
  • the electronic device 101 includes a light emitting unit 510 , a plurality of light receiving units 521 and 523 divided into two channels, a front-end module 530 (eg, AFE); and a processor 570 (eg, the processor 120 of FIG. 1 ).
  • a front-end module 530 eg, AFE
  • a processor 570 eg, the processor 120 of FIG. 1
  • the configuration of the electronic device 101 is not limited thereto, and various blocks for providing a service (or function) by measurement of a biosignal (eg, HRM, HRV, ECG, PPG, and/or SpO 2 signal) and / or circuitry.
  • a biosignal eg, HRM, HRV, ECG, PPG, and/or SpO 2 signal
  • the front-end module 530 receives an electrical signal (eg, a first signal, a second signal) for each channel from the light receiving units 521 and 523 , and processes the signal based on the corresponding channel to process the signal. You can pass it to (570).
  • the front-end module 530 may process (eg, remove or include a DC component) the sensed signal (eg, AC+DC), and transmit it to the processor 570 .
  • the front-end module 530 may include amplifiers 541 and 543 , a phase converter 1050 , and an A/D converter 560 .
  • the configuration of the front-end module 530 is not limited thereto, and may include various blocks and/or circuits for appropriate processing by the processor 570 .
  • the first signal (eg, DC+AC) of the first light receiving unit 521 according to the first channel may be transmitted to the A/D converter 560 through the first TIA 541 .
  • the second signal (eg, DC+AC) of the second light receiving unit 523 according to the second channel is the third signal (eg, DC-AC) or the second signal processed through the phase converter 1050 . It may be converted into 4 signals (eg, -(DC+AC)) and transmitted to the A/D converter 560 .
  • the phase converter 1050 may remove the DC component (extract only the AC component) from the A/D converter 560 according to the first state (or first mode) of the electronic device 101 .
  • the second signal eg, DC+AC
  • the third signal eg, DC-AC
  • the first state may include a state that operates to acquire first sensor data (eg, a PPG signal) for a first service (or function).
  • the phase converter 1050 maintains the DC component and the AC component in the A/D converter 560 according to the second state (or second mode) of the electronic device 101 , so that the second signal (eg, DC+AC) may serve to generate a fourth signal (eg, -(DC+AC)) by substantially inverting the DC component and the AC component.
  • the second state may include a state that operates to acquire second sensor data (eg, an SpO 2 signal) for a second service (or function).
  • the phase shifter 1050 may include an inverting amplifier 1051 , a filter 1053 , and a switch 1055 (or switch circuitry).
  • the phase shifter 1050 may be interpreted as including a voltage reference (Vref) (or reference circuitry).
  • Vref voltage reference
  • the configuration of the phase converter 1050 is not limited thereto, and may include various blocks and/or circuits for inverting a given signal based on a given reference potential point for proper processing by the A/D converter 560 . have.
  • the inverting amplifier 1051 is operatively and/or electrically coupled with a second TIA 543 of a second channel to provide a second signal from the second TIA 543 to a given reference potential point. may serve to output the third signal or output the fourth signal by inverting based on the .
  • the inverting amplifier 1051 may include a first input port (eg, an inverting terminal (-)), a second input port (eg, a non-inverting terminal (+)), and one output port. have.
  • the inverting amplifier 1051 converts the second signal of the second TIA 543 input to the first input port to the third signal based on the reference potential applied to (or input) the second input port. Alternatively, it may be inverted with the fourth signal.
  • the second input port of the inverting amplifier 1051 is connected to the filter 1053 and the first electrical path based on the switching of the switch 1055, or the reference voltage Vref (or reference circuit) and the second It may be connected by an electrical path.
  • a first reference potential of the filter 1053 is input to the second input port of the inverting amplifier 1051 according to a first electrical path, or a reference voltage Vref ( Alternatively, the second reference potential of the reference circuit) may be input.
  • the first reference potential passing through the filter 1053 may include a DC component of a specific voltage.
  • the second reference potential of the reference voltage Vref may not (almost) flow current and may include a ground potential (eg, 0V).
  • the method instead of the reference voltage Vref circuit, may include implementing the second electrical path by grounding the second electrical path to the ground.
  • the filter 1053 inverts a reference potential (eg, a first reference potential) for centered on DC for inverting the second signal of the second TIA 543 in the inverting amplifier 1051 . It may be provided as an amplifier 1051 . According to one embodiment, the filter 1053 may include an LPF. According to one embodiment, the filter 1053 is between the second TIA 543 and the inverting amplifier 1051, one end is connected to the second TIA 543, the other end is an inverting amplifier 1051 (eg, an inverting amplifier) (Second input port of 1051) may be formed to be connected.
  • a reference potential eg, a first reference potential
  • the filter 1053 may serve to determine a reference potential (eg, a first reference potential) for a signal (eg, a third signal) inverted through the inverting amplifier 1051 .
  • a reference potential eg, a first reference potential
  • the filter 1053 extracts (or filters) a specified signal (eg, a DC component) from a signal (eg, the second signal) of the second TIA 543 of the second channel to reverse the second signal. It may be provided to the inverting amplifier 1051 as a reference signal (or reference value) for
  • the switch 1055 may switch the electrical path of the inverting amplifier 1051 based on the control of the processor 570 .
  • the switch 1055 includes a first electrical path for inputting the first reference potential by the filter 1053 to the inverting amplifier 1051 (eg, the second input port of the inverting amplifier 1051) and The second reference potential based on the reference voltage Vref may serve as a switching function between the second electrical paths for inputting the second reference potential to the inverting amplifier 1051 (eg, the second input port of the inverting amplifier 1051 ).
  • the switch 1055 may be implemented as at least one switch for connecting an electrical path (eg, a first electrical path, a second electrical path) and the inverting amplifier 1051 .
  • the switch 1055 is a first switch, reference to open (or open) or short (or short) the first electrical path between the filter 1053 and the inverting amplifier 1051 .
  • the second electrical path between the voltage Vref and the inverting amplifier 1051 may include two switches of a one-circuit, one-contact type based on each electrical path, such as a second switch for opening or shorting.
  • the switch 1055 is between the inverting amplifier 1051 and each electrical path, one circuit 2 for selectively connecting (eg, open or short) to one of a first electrical path and a second electrical path. It may include one switch of the contact type.
  • the A/D converter 560 is operatively and/or electrically connected to the first TIA 541 of the first channel and the inverting amplifier 1051 of the second channel to signal (eg, the second It may serve to digitize the difference between the first signal and the third signal, or the first signal and the fourth signal).
  • the A/D converter 560 receives an analog (waveform) signal (eg, a first signal) from the first TIA 541 of the first channel and the inverting amplifier 1051 of the second channel. Only the AC component is inverted and a fifth signal (eg, AC component from which the DC component is removed) generated by the difference of the received analog (waveform) signal (eg, the third signal) may be digitized and provided to the processor 570 .
  • the first signal (eg, DC+AC) of the first channel and the third signal (eg, DC-AC) of the second channel having opposite phases are differential of the A/D converter 560 .
  • the A/D converter 560 receives the first signal and the third signal from the first signal and the third signal. It is possible to remove the DC component and output only the AC component.
  • the A/D converter 560 receives an analog (waveform) signal (eg, a first signal) from the first TIA 541 of the first channel and the inverting amplifier 1051 of the second channel.
  • a sixth signal eg, including a DC component and an AC component generated by the difference between the received analog (waveform) signal (eg, the fourth signal) with the DC component and the AC component inverted is digitized and provided to the processor 570 can do.
  • the first signal and the fourth signal having opposite phases are differentially input to the two input ports of the A/D converter 560, respectively, and the A/D converter 560 receives the first signal and the fourth signal from the first signal and the fourth signal. It can output including DC component and AC component.
  • the processor 570 may serve to control the configuration of the electronic device 101 .
  • the processor 570 may perform various operations based on an output signal of the front-end module 530 .
  • the processor 570 calculates information (eg, health information) about the corresponding biosignal using the biosignal (eg, HRM, HRV, ECG, PPG, and/or SpO 2 ) to the user.
  • the processor 570 may control switching of an electrical path for acquiring corresponding sensor data based on a service (or function) provided.
  • the processor 570 when the processor 570 uses the first sensor data (eg, a PPG signal) based on the first service, the DC component is removed based on the first switching control and only the AC component is extracted (or acquisition) can be performed.
  • the processor 570 may control switching of the switch 1055 so that a signal of the filter 1053 is input to the inverting amplifier 1051 for the first sensor data.
  • the processor 570 switches the switch 1055 to short the electrical path between the filter 1053 and the inverting amplifier 1051 . ) can be controlled.
  • the processor 570 when the electronic device 101 uses two switches 1055 of a one-circuit, one-contact type, the processor 570 performs the first switch of the first electrical path between the filter 1053 and the inverting amplifier 1051 . to control the switching to open the second switch of the second electrical path between the reference voltage Vref and the inverting amplifier 1051 .
  • the processor 570 displays information (eg, PPG signal-based health information) according to the first service based on the acquired first sensor data (eg, the display 220 of FIG. 2 ). can be provided to users.
  • information eg, PPG signal-based health information
  • the processor 570 extracts (or acquires) a DC component and an AC component based on the second switching control when using the second sensor data (eg, an SpO 2 signal) based on the second service. ) to perform signal processing.
  • the processor 570 may control the switching of the switch 1055 so that a signal of the reference voltage Vref is input to the inverting amplifier 1051 for the second sensor data.
  • the processor 570 switches the switch ( 1055) can be controlled.
  • the processor 570 when the electronic device 101 uses two switches 1055 of a one-circuit, one-contact type, the processor 570 performs the first switch of the first electrical path between the filter 1053 and the inverting amplifier 1051 . to open and control switching to short the second switch of the second electrical path between the reference voltage Vref and the inverting amplifier 1051 .
  • the processor 570 displays information (eg , health information based on SpO 2 signal) according to the second service based on the acquired second sensor data (eg, the display 220 of FIG. 2 ). can be provided to users.
  • 11 is a diagram illustrating an example of configuring a switch in a front-end module in an electronic device according to an embodiment.
  • 12 is a diagram illustrating an example of a configuration of a switch circuit of a front-end module in an electronic device according to an embodiment.
  • 13 is a diagram illustrating another example of a configuration of a switch circuit of a front-end module in an electronic device according to an embodiment.
  • FIG. 11 shows blocks and/or circuits constituting the light receiving units 521 and 523 and the front-end module 530 corresponding to FIG. 10 in the electronic device 101 according to various embodiments of the present disclosure.
  • FIG. 11 shows blocks and/or circuits constituting the light receiving units 521 and 523 and the front-end module 530 corresponding to FIG. 10 in the electronic device 101 according to various embodiments of the present disclosure.
  • the components and operations of the electronic device 101 according to the example of FIG. 11 other than the configuration of the phase converter 1050 for the switching structure are described with reference to FIGS. 6 and 10 . Since it may correspond to the components described in the section, a detailed description thereof will be omitted.
  • the receiving end of the electronic device 101 uses a plurality of photodiodes 521 and 523 (eg, PD1 521 , PD2 523 ).
  • the electronic device 101 is divided into two channels (eg, a first channel and a second channel), and a photodiode (eg, PD1) which is a light receiving element for the first light receiving unit 521 of the first channel and a photodiode (eg, PD2) serving as a light receiving element for the second light receiving unit 523 of the second channel.
  • the first light receiving unit 521 and the second light receiving unit 523 may each include a plurality of photodiodes, and may include the same or different number of photodiodes in each channel.
  • the electronic device 101 is operatively and/or electrically connected to each of the light receiving units 521 and 523 divided into two channels, and processes the signals of each of the light receiving units 521 and 523 (eg: It may include amplifiers 541 and 543 (eg, first TIA 541 and second TIA 543 ) for converting and amplifying).
  • the amplifiers 541 and 543 may include a first TIA 541 that processes the signal of the first light receiving unit 521 of the first channel and a second second that processes the signal of the second light receiving unit 523 of the second channel.
  • TIA 543 may be included.
  • the amplifiers 541 and 543 may use an operational amplifier and may include devices (eg, resistors and capacitors) for stable operation.
  • the first signal 1110 processed through the first TIA 541 of the first channel may be input to the first input terminal (or port) (+) of the A/D converter 560 . have.
  • the second signal 1120 processed through the second TIA 543 of the second channel may be input to the phase converter 1050 .
  • an input reference potential eg, a first reference potential or a second reference potential. or 180 degree phase shift
  • the phase converter 1050 inverts the second signal 1120 of the second TIA 543 of the second channel to have a 180 degree phase difference based on the reference potential input to the inverting amplifier 1051 .
  • Inverting amplifier 1051 filter 1053 that provides a reference signal (or first reference potential) for setting the DC component to the inverting center from which the DC component of the second signal 1120 can be removed in the inverting amplifier 1051 .
  • a reference voltage Vref that provides a reference signal (or a second reference potential) for aligning an inversion center in which the DC component of the second signal 1120 can be maintained in the inverting amplifier 1051
  • a filter 1053 that provides a reference signal (or a second reference potential) for aligning an inversion center in which the DC component of the second signal 1120 can be maintained in the inverting amplifier 1051 .
  • a switch 1055 for switching an electrical path such that the first reference potential according to the reference potential or the second reference potential according to the reference voltage Vref is input to the inverting amplifier 1051 may be included.
  • the inverting amplifier 1051 may use an operational amplifier and may include a device (eg, a resistor) for stable operation.
  • the filter 1053 may use an LPF.
  • the inverting amplifier 1051 may include a first input port (eg, an inverting terminal (-)), a second input port (eg, a non-inverting terminal (+)), and one output port. have.
  • the second input port of the inverting amplifier 1051 may be connected to the filter 1053 through a first electrical path or a reference voltage Vref and a second electrical path based on the switching of the switch 1055 .
  • a first reference potential (eg, ⁇ (DC)) of the filter 1053 is input to the second input port of the inverting amplifier 1051 according to a first electrical path, or a second electrical path
  • a second reference potential (eg, 0V) of the reference voltage Vref may be input.
  • the first reference potential passing through the filter 1053 may include a DC component (eg, ⁇ (DC)) of a specific voltage.
  • the second reference potential of the reference voltage Vref may include a ground potential (eg, 0V).
  • the method may include implementing the second electrical path by grounding the second electrical path to the ground.
  • the phase converter 1050 is connected to the first electrical path between the filter 1053 and the inverting amplifier 1051 through the switch 1055, the second signal 1120 to the filter 1053
  • the A/D converter ( 560) can be printed.
  • an inverted fourth signal eg, - ⁇ (DC+AC)
  • the inverting amplifier 1051 has a first input port (eg, an inverting terminal (-)) operatively and/or electrically connected to a second TIA 543 of a second channel, and a second An input port (eg, a non-inverting terminal (+)) may be operatively and/or electrically connected to the filter 1053 or a reference voltage (Vref).
  • a first input port eg, an inverting terminal (-)
  • An input port eg, a non-inverting terminal (+)
  • Vref reference voltage
  • the inverting amplifier 1051 when a first reference potential is applied to the second input port, the second signal 1120 (eg, ⁇ (DC+AC)) input to the first input port and the second input Based on the first reference potential (eg, ⁇ (DC)) input to the port, the second signal 1120 is shifted (or floated) from the ground by a certain range instead of the ground reference (eg, the second signal ( 1120), corresponding to the input DC component).
  • the inverting amplifier 1051 may amplify and invert a voltage between two points that are not referenced to the ground by a predetermined amplification and output the amplified voltage.
  • the inverting amplifier 1051 may amplify a signal that does not change according to a ground reference (or a signal floating on the ground).
  • the inverting amplifier 1051 is configured to receive a second TIA 543 when a second reference potential (eg, 0V) of the reference voltage Vref is input to the second input port according to the connection of the second electrical path. ) by inverting the second signal 1120 to output the fourth signal 1140 (eg, - ⁇ (DC+AC)).
  • a second reference potential eg, 0V
  • the inverting amplifier 1051 uses the second signal 1120 (eg, ⁇ (DC+AC)) input to the first input port as the ground reference.
  • the inverting amplifier 1051 may amplify and invert the voltage between two points with respect to the ground by a predetermined amplification degree and output the amplified voltage.
  • the filter 1053 is formed between the second TIA 543 and the inverting amplifier 1051 , so that the center for inversion of the second signal 1120 in the inverting amplifier 1051 is DC.
  • a first reference potential for this may be provided to the inverting amplifier 1051 .
  • the reference voltage Vref may provide the inverting amplifier 1051 with a second reference potential for locating the center for inversion of the second signal 1120 in the inverting amplifier 1051 to the ground. .
  • the switch 1055 selectively selects one of the first electrical path between the filter 1053 and the inverting amplifier 1051 and the second electrical path between the reference voltage Vref and the inverting amplifier 1051 . It may be formed to be connected. According to an embodiment, the third signal 1130 or the fourth signal 1140 processed through the inverting amplifier 1051 is input to the second input terminal (or port) ( ⁇ ) of the A/D converter 560 . can be
  • the switch 1055 may be implemented as at least one switch for connecting an electrical path (eg, a first electrical path, a second electrical path) and the inverting amplifier 1051 .
  • the switch 1055 opens (or disconnects) or shorts the first electrical path between the filter 1053 and the inverting amplifier 1051 ( or short circuit) for each electrical path, such as a second switch (eg SW2) for opening or shorting a first switch (eg SW1), a second electrical path between the reference voltage (Vref) and the inverting amplifier 1051
  • a second switch eg SW2
  • a first switch eg SW1
  • Vref reference voltage
  • one circuit may include two switches SW1 and SW2 of a one-contact type.
  • the switch 1055 is selectively connected to one of a first electrical path and a second electrical path between the inverting amplifier 1051 and each electrical path (eg: It may include one switch (SW) of a one-circuit two-contact method for opening or shorting).
  • SW switch
  • the switch 1055 shorts the first electrical path between the filter 1053 and the inverting amplifier 1051, based on the first control of the processor 570, and inverts the reference voltage Vref.
  • a second electrical path between the amplifiers 1051 may be switched to open.
  • the switch 1055 opens a first electrical path between the filter 1053 and the inverting amplifier 1051 based on the second control of the processor 570 and sets the reference voltage Vref and the inverting amplifier 1051 . It is possible to switch to short the second electrical path between 1051 .
  • the first signal 1110 of the first channel and the third signal 1130 or the fourth signal 1140 of the second channel may be used as a differential input of the A/D converter 560 . .
  • the A/D converter 560 removes the DC component based on the first signal 1110 and the third signal 1130 and the fifth signal 1150 (or the fifth signal 1150 ) in which only the AC component remains.
  • the first signal 1110 and the third signal 1130 are respectively differentially input to the two input ports of the A/D converter 560 , and the A/D converter 560 receives the first signal 1110 . and only the AC component from which the DC component is removed from the third signal 1130 may be output.
  • the difference between (DC+AC) of the first signal 1110 and (DC-AC) of the third signal 1130 is '2AC' of the amplifiers 541 and 543 .
  • a fifth signal 1150 '2 ⁇ (AC)' multiplied by a gain constant ' ⁇ ' (eg, ⁇ x2AC) may be obtained.
  • the A/D converter 560 is a sixth signal 1160 (or a sixth output) including a DC component and an AC component, based on the first signal 1110 and the fourth signal 1140 .
  • the processor 570 may be a sixth signal 1160 (or a sixth output) including a DC component and an AC component, based on the first signal 1110 and the fourth signal 1140 .
  • the first signal 1110 and the fourth signal 1140 are respectively differentially input to the two input ports of the A/D converter 560 , and the A/D converter 560 receives the first signal 1110 , respectively. and a DC component in the fourth signal 1140 may be maintained to output both the DC component and the AC component.
  • the A/D converter 560 is an amplifier to '2(DC+AC)', a difference between (DC+AC) of the first signal 1110 and -(DC+AC) of the fourth signal 1140 .
  • a sixth signal 1160 '2 ⁇ (DC+AC)' multiplied by the gain constant ' ⁇ ' of (541, 543) (eg, ⁇ x2(DC+AC)) may be obtained.
  • FIGS. 14 and 15 are diagrams illustrating an example of a simulation based on an electronic device according to various embodiments of the present disclosure.
  • FIGS. 14 and 15 are based on the switching of the switch 1055 in the configuration of the electronic device 101 including (or applied) the switch 1055 as shown in FIGS. 10 and 11 .
  • a graph showing a simulation result for comparing a difference according to a reference potential input to the inverting amplifier 1051 may be shown.
  • the x-axis may represent time (s)
  • the y-axis may represent a DC component.
  • the second reference potential of the filter 1053 (eg, about DC 250 mV) is When it is applied to the second input port (eg, non-inverting terminal (+)) of the inverting amplifier 1051, it can be seen that the magnitude of AC is about 480 uV.
  • the example of FIG. 15 shows a second reference potential (eg, about DC 0V) of the reference voltage Vref according to the connection of the second electrical path between the reference voltage Vref and the inverting amplifier 1051 . ) is applied to the second input port (eg, non-inverting terminal (+)) of the inverting amplifier 1051, it can be seen that the magnitude of AC is about 480uV.
  • a second reference potential eg, about DC 0V
  • the electronic device 101 includes a light emitting unit that outputs light (eg, the light emitting unit 510 of FIG. 5 or 10 ), and a first light receiving unit that detects the light from a first channel.
  • a light receiving unit including (eg, the first light receiving unit 521 of FIG. 5 or 10 ) and a second light receiving unit (eg, the second light receiving unit 523 of FIG. 5 or 10 ) for detecting the light in a second channel; and a processing circuitry for processing the light detected by the first light receiving unit and the second light receiving unit in the first channel and the second channel (eg, the front-end module 530 of FIG. 5 or 10).
  • a first amplifier eg, a first amplifier that is operatively connected to the first light receiving unit and processes the first signal of the first channel through the first light receiving unit into a second signal of a specified level
  • the processing circuit includes: The first TIA 541 of FIG. 5 or 10) is operatively connected to the second light receiving unit and processing the third signal of the second channel through the second light receiving unit as a fourth signal of a specified level 2 amplifiers (eg, the second TIA 543 of FIG. 5 or FIG. 10 ), and a phase converter that inverts the phase of the fourth signal output from the second amplifier to output a fifth signal (eg, FIG. 5 or FIG.
  • the acid converters 550 and 1050 10, the acid converters 550 and 1050), and output a signal designated based on the second signal input from the first amplifier and the fifth signal having an opposite phase to the second signal input from the phase shifter and an analog-to-digital (A/D) converter (eg, the A/D converter 560 of FIG. 5 or FIG. 10 ).
  • A/D analog-to-digital
  • the phase converter is operatively connected to the second amplifier, and an inverting amplifier (eg, FIG. 5 or inverting amplifiers 551 and 1051 of FIG. 10) may be included.
  • an inverting amplifier eg, FIG. 5 or inverting amplifiers 551 and 1051 of FIG. 10.
  • the phase converter between the second amplifier and the inverting amplifier, is operatively connected to the second amplifier and the inverting amplifier, and provides a reference value of the inverting amplifier
  • a filter eg, the filters 553 and 1053 of FIG. 5 or 10 .
  • the first light receiving unit and the second light receiving unit may include one or more light receiving elements that convert light energy into electrical energy.
  • the first light receiving unit includes a plurality of first photodiodes (PD) for the first channel
  • the second light receiving unit includes a plurality of first photodiodes (PD) for the second channel.
  • Two photodiodes may be included.
  • the number of the first photodiode and the second photodiode may be the same or different.
  • the gains of the first amplifier and the second amplifier may be set to be the same.
  • a gain of the first amplifier or the second amplifier is adjusted to adjust the gain of the first channel and the second photodiode. You can set the channels to have the same DC level.
  • the A/D converter differentially inputs the second signal and the fifth signal having an opposite phase to the second signal to remove the DC component and to remove the AC component of the designated signal. can be printed out.
  • the phase converter includes a switch circuitry (eg, the switch of FIG. 10 ) for switching an electrical path based on sensor data measurement based on DC component removal or DC component maintenance. (1055)).
  • a switch circuitry eg, the switch of FIG. 10 for switching an electrical path based on sensor data measurement based on DC component removal or DC component maintenance. (1055)).
  • the switch circuit selectively forms a first electrical path between the filter and the inverting amplifier or a second electrical path between a reference circuit and the inverting amplifier, and and at least one switch for switching supply of a reference potential according to the filter or a reference potential according to the reference circuit.
  • the electronic device 101 includes a processor (eg, the processor 570 of FIG. 5 or 10 ), the processor detects a trigger related to sensor data acquisition, , based on a trigger related to acquisition of sensor data of a first type, set a signal processing path for removing a DC component based on a first switching control of the switch circuit, and based on a trigger related to acquisition of sensor data of a second type Accordingly, a signal processing path including a DC component may be set based on the second switching control of the switch circuit.
  • a processor eg, the processor 570 of FIG. 5 or 10
  • the processor detects a trigger related to sensor data acquisition, , based on a trigger related to acquisition of sensor data of a first type, set a signal processing path for removing a DC component based on a first switching control of the switch circuit, and based on a trigger related to acquisition of sensor data of a second type Accordingly, a signal processing path including a DC component may be set based on the second switching control of the switch circuit
  • the processor controls the switch circuit so that the signal of the filter is input to the inverting amplifier based on the first switching control, and based on the second switching control,
  • the switch circuit may be controlled so that the signal of the reference circuit is input to the inverting amplifier.
  • a front-end module (eg, the front-end of FIG. 5 or 10 ) of a device (eg, the electronic device 101 or a sensor) for measuring a biosignal using light according to various embodiments of the present disclosure
  • the module 530 is operatively connected to a first light receiving unit (eg, the first light receiving unit 521 of FIG. 5 or 10) that detects the light of a first channel from the outside of the front-end module,
  • a first amplifier eg, the first TIA 541 of FIG. 5 or 10) for converting and amplifying the first signal of the first channel through the first light receiving unit into a second signal of a specified level
  • the front-end module A second light receiving unit (eg, the second light receiving unit 523 of FIG.
  • a second amplifier eg, the second TIA 543 of FIG. 5 or 10
  • An inverting phase shifter eg, the phase shifters 550 and 1050 of FIG. 5 or FIG. 10
  • An analog-to-digital (A/D) converter eg, the A/D converter 560 of FIG. 5 or FIG. 10 ) for outputting a specified signal based on the fifth signal whose phase is inverted may be included.
  • the phase converter is operatively connected to the second amplifier and inverts the phase of the fourth signal output from the second amplifier to output the fifth signal an amplifier (eg, inverting amplifier 551 , 1051 of FIG. 5 or FIG. 10 ), and between the second amplifier and the inverting amplifier, operatively coupled with the second amplifier and the inverting amplifier, the second amplifier A filter (eg, filters 553 and 1053 of FIG. 5 or FIG. 10 ) may be included to provide a reference potential for setting the inverting center of the inverting amplifier to DC from the fourth signal of
  • the phase converter may include a reference circuit (eg, the reference voltage Vref of FIG. 10 ) that provides a reference potential for setting the inverting center of the inverting amplifier to DC. have.
  • a reference circuit eg, the reference voltage Vref of FIG. 10
  • the phase converter is a switch circuit for switching a connection by a first electrical path between the inverting amplifier and the filter or a second electrical path between the inverting amplifier and the reference circuit (eg, the switch 1055 of FIG. 10 ).
  • the inverting amplifier includes a first input port (eg, an inverting terminal (-)), a second input port (eg, a non-inverting terminal (+)), and an output port, and ,
  • the second input port is connected to the filter and the first electrical path based on the switching of the switch circuit, or is connected to the reference circuit and the second electrical path, the reference potential applied to the second input port based on the inversion of the fourth signal of the second amplifier input to the first input port may be processed.
  • operations performed by the electronic device 101 to be described below are at least one processor 570 (eg, at least one processor including a processing circuit) of the electronic device 101 , for example
  • it may be executed by the processor 120 of FIG. 1 (hereinafter referred to as a 'processor 570').
  • operations performed by the electronic device 101 are stored in a memory (eg, the memory 130 of FIG. 1 ) (hereinafter referred to as a 'memory 130'), and when executed, the processor may be executed by instructions that cause 120 to operate.
  • 16 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure
  • a filter 1053 and an inverting amplifier 1051 in the phase converter 1050 of the front-end module 530 can represent
  • the processor 570 may serve to control the configuration of the electronic device 101 .
  • the processor 570 may perform various operations based on the output signal of the front-end module 530 .
  • the processor 570 calculates information (eg, health information) about the corresponding biosignal using the biosignal (eg, HRM, HRV, ECG, PPG, and/or SpO 2 ) and provides it to the user can do.
  • the processor 570 may control switching of an electrical path for acquiring corresponding sensor data based on a service (or function) provided.
  • the processor 570 of the electronic device 101 may detect a trigger related to sensor data acquisition.
  • the processor 570 is a user's biosignals (eg, HRM, HRV, ECG, PPG, and/or SpO 2 ) Based on the execution of a health function (or health application) related to measurement, the biosignal A user input requesting a measurement may be received.
  • the processor 570 may check a designated period and/or time point, and may automatically measure a biosignal automatically at each designated period and/or time point.
  • the processor 120 may determine a user input detection and/or automatic measurement time as a trigger related to acquisition of sensor data.
  • the processor 570 may identify whether the trigger corresponds to the first type data (or sensor data) or the second type data based on the trigger detection.
  • the processor 570 detects a trigger for acquiring sensor data, the corresponding trigger is used to acquire first type data (or biosignal) for providing information related to a first service (or function). Whether it is a related trigger or a trigger related to acquisition of second type data (or biosignal) for providing information related to the second service, the type of the trigger may be identified.
  • the first type data includes, for example, first sensor data (eg, a PPG signal) including only an AC component excluding a DC component, based on a first service (eg, heart rate measurement function).
  • the second type data includes, for example, a DC component and an AC component with a DC component maintained (or not removed) based on a second service (eg, oximetry function). and second sensor data (eg, an SpO 2 signal).
  • a second service eg, oximetry function
  • second sensor data eg, an SpO 2 signal
  • the processor 570 1 it is possible to perform signal processing to remove the DC component and extract (or acquire) only the AC component based on the switching control.
  • the processor 570 may control the switching of the switch 1055 so that the signal of the filter 1053 is input to the inverting amplifier 1051 to obtain the first sensor data.
  • the processor 570 performs a first electrical connection between the filter 1053 and the inverting amplifier 1051 .
  • the switch 1055 can be controlled to short the path.
  • the processor 570 may It is possible to control switching for shorting the first switch of the first electrical path and opening the second switch of the second electrical path between the reference voltage Vref and the inverting amplifier 1051 .
  • the processor 570 displays information according to the first service (eg, health information based on a PPG signal) based on the acquired first sensor data (eg, the display 220 of FIG. 2 ) to the user through a display (eg, the display 220 of FIG. 2 ).
  • the first service e.g, health information based on a PPG signal
  • the acquired first sensor data e.g, the display 220 of FIG. 2
  • a display eg, the display 220 of FIG. 2 .
  • the processor 570 may control the switching of the switch 1055 so that a signal of the reference voltage Vref is input to the inverting amplifier 1051 for the second sensor data. For example, when the electronic device 101 uses one switch 1055 of a one-circuit, two-contact type, the processor 570 shorts the second electrical path between the reference voltage Vref and the inverting amplifier 1051 .
  • the switch 1055 may be controlled.
  • the processor 570 performs the first switch of the first electrical path between the filter 1053 and the inverting amplifier 1051 . to open and control switching to short the second switch of the second electrical path between the reference voltage Vref and the inverting amplifier 1051 .
  • the processor 570 displays information (eg, health information based on SpO 2 signal) according to the second service based on the acquired second sensor data (eg, the display 220 of FIG. 2 ) through a display (eg, the display 220 of FIG. 2 ). can be provided to users.
  • information eg, health information based on SpO 2 signal
  • An operation method performed by the electronic device 101 capable of measuring a biosignal includes an operation of detecting a trigger related to sensor data acquisition, and the trigger providing information related to a first service.
  • a trigger related to acquisition of first sensor data for
  • an operation of performing signal processing to extract a DC component and an AC component based on the second switching control may be included.
  • an operation of controlling switching of a switch circuit such that a first reference potential is input to an inverting amplifier to obtain the first sensor data, and the first sensor data based on the obtained first sensor data may include an operation of providing information according to the service through a display.
  • the obtained second may include providing information according to the second service through a display based on sensor data.

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Abstract

Divers modes de réalisation concernent une structure de nœud de réception d'un dispositif électronique pour mesurer un signal biométrique à l'aide de lumière et un procédé de fonctionnement correspondant. Un dispositif électronique selon divers modes de réalisation peut comprendre : une unité électroluminescente pour émettre de la lumière ; une unité de réception de lumière comprenant une première unité de réception de lumière pour détecter la lumière dans un premier canal et une deuxième unité de réception de lumière pour détecter la lumière dans un deuxième canal ; et un circuit de traitement qui traite, dans le premier canal et le deuxième canal, la lumière détectée par la première unité de réception de lumière et la deuxième unité de réception de lumière, le circuit de traitement comprenant : un premier amplificateur qui est raccordé fonctionnellement à la première unité de réception de lumière et qui traite un premier signal du premier canal, qui est reçu à travers la première unité de réception de lumière, de telle sorte que le premier signal devient un deuxième signal présentant un niveau désigné ; un deuxième amplificateur qui est raccordé fonctionnellement à la deuxième unité de réception de lumière et qui traite un troisième signal du deuxième canal, qui est reçu à travers la deuxième unité de réception de lumière, de telle sorte que le troisième signal devient un quatrième signal présentant un niveau désigné ; un déphaseur qui décale la phase du quatrième signal délivré par le deuxième amplificateur pour émettre un cinquième signal ; et un convertisseur A/N qui délivre un signal désigné sur la base du deuxième signal entré à partir du premier amplificateur et du cinquième signal, qui est entré à partir du déphaseur et dont la phase est opposée à celle du deuxième signal. Divers modes de réalisation sont possibles.
PCT/KR2021/002567 2020-03-02 2021-03-02 Dispositif électronique pour mesurer un signal biométrique à l'aide de lumière et procédé de fonctionnement correspondant WO2021177701A1 (fr)

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KR20020042322A (ko) * 2000-11-30 2002-06-05 임효택 광송신기의 비선형 왜곡 제거장치 및 방법
JP2006003127A (ja) * 2004-06-15 2006-01-05 Hokuyo Automatic Co 光波測距装置
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JPH07308299A (ja) * 1994-05-18 1995-11-28 Tetsuji Fukamizu 脈波検出方法及び装置
KR20020042322A (ko) * 2000-11-30 2002-06-05 임효택 광송신기의 비선형 왜곡 제거장치 및 방법
JP2006003127A (ja) * 2004-06-15 2006-01-05 Hokuyo Automatic Co 光波測距装置
US20070260145A1 (en) * 2006-05-03 2007-11-08 Heanue John F Photon measurement method and apparatus
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