CN107076807A - Hall sensor chip with SECO - Google Patents

Hall sensor chip with SECO Download PDF

Info

Publication number
CN107076807A
CN107076807A CN201580059568.3A CN201580059568A CN107076807A CN 107076807 A CN107076807 A CN 107076807A CN 201580059568 A CN201580059568 A CN 201580059568A CN 107076807 A CN107076807 A CN 107076807A
Authority
CN
China
Prior art keywords
signal
sensor
sensing
clock
electric power
Prior art date
Application number
CN201580059568.3A
Other languages
Chinese (zh)
Inventor
杨文佳
K·塔帕
卓英堂
C-Y·蔡
R·鲁滨逊
Original Assignee
达尔科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US14/929,157 priority Critical patent/US10191505B2/en
Priority to US14/929,157 priority
Application filed by 达尔科技股份有限公司 filed Critical 达尔科技股份有限公司
Priority to PCT/US2015/058693 priority patent/WO2016073386A1/en
Publication of CN107076807A publication Critical patent/CN107076807A/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/02Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices, e.g. Hall effect devices; using magneto-resistive devices
    • G01R33/07Hall effect devices
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66Regulating electric power

Abstract

A kind of sensor device includes:Sensor element, it, which is used to measure, stimulates and produces to induction signal;ADC, it is used to convert the signals to multistation digital signal;Memory cell, it is used to store the data signal;And timing unit, it is used to cut off the sensor element in signal described in the ADC positive transitions and for cutting off the ADC after the data signal is stored in the memory.

Description

Hall sensor chip with SECO

Background technology

Modern sensor system is produced when being subjected to outside stimulus to be read or pass through directly at the output of sensing system Further handle and be then brought to the signal of down-stream system.A variety of stimulation modem sensing systems are designed to sense Survey comprising sound, temperature, weight, position, electric current and voltage, light, color, movement velocity, magnetic field, pressure and two dimension and three Tie up the foreign matter in geometry, solution (for example, blood, urine etc.).Among modern sensor, hall effect sensor is (suddenly That sensor) it is designed to sense the presence in magnetic field and measures the intensity in magnetic field or can be exchanged into other measurable amounts in magnetic field.

A type of known Hall sensor systems constantly measure magnetic field and constantly export measured data.Herein In the case of the Hall sensor of type, the sensing part (for example, Hall Plate) of sensing system and data processing section are held It is powered to maintaining test constantly and output continuously.Most of linear hall sensors belong to this type.

The sporadic ground of known Hall sensor systems of Second Type periodically measures magnetic field.Sensed with linear Hall Device is compared, and the Hall sensor of this Second Type is suitable to wherein only need the application of the occasional readings in magnetic field.Except needing carry out Outside during the short cycle of measurement, the Hall sensor of this type is generally maintained at power-off.During these short cycles, sensing The sensing part of device and data processing section both of which are energized, so as to measure and handle and show measurement data.In week Outside phase window, without measurement and can not be from information measured by systematic collection.

The content of the invention

Applicants studied the existing Hall sensor and notice the existing Hall sensor all with serious Defect.The Hall sensor (that is, linear hall sensor) of the first kind is extremely low power efficiency.Although can be easy to from such The sensor of type obtains data output (this is desirable for some applications), but high power consumption causes the Hall of this type to pass Sensor is poor selection for the application of many storage battery power supplies.

The Hall sensor of Second Type has limited availability of data.Although the Hall sensor of this type is because of system Not constantly be powered and relatively have power efficiency, but when power is off between during, outside can not obtain data and this so that sensor It is unsuitable for many applications.

Inventors noted that these defects not only influence biosensor systems, and have an effect on many other sensors System.To improve both power efficiency and availability of data, inventor has invented a kind of new sensor system, wherein power consumption Remain extremely low and measured data remained before next measurement is carried out it is accessible.These benefits to entering by passing The electric power of the difference in functionality block of sensor system carries out intelligent management and realized.

The present invention can be understood by exemplary Hall sensor systems, but the present invention is applied to mentioned in background parts Many other sensing systems.The new sensor system includes some functional blocks, and the functional block includes electric supply Block and measurement and data processing block, the measurement and data processing block draw the electricity in varying level from electric supply block Power.

The new Hall sensor systems have Hall Plate, and the Hall Plate is measurement magnetic field and converts magnetic fields to voltage The semiconductor device of signal.Signal from the Hall Plate is typically simulation after zooming.For via hyundai electronicses device Part handles the signal, and the sensing system is comprising obtaining analog signal and the analog signal is converted into number format A/D converter (ADC) block.In addition, the system has memory cell.The memory block is followed behind the ADC And including the register for the numerical data for keeping exporting from converter.

It can need that the numerical data is further processed.For example, applied for some, the data signal It can need to be returned to analog form.This is complete using D/A converter (DAC) block followed behind ADC and memory cell Into.

In this exemplary sensor system, after the magnetic field is measured and the voltage signal is being amplified and locked After in ADC, the Hall Plate is turned off.Therefore, incited somebody to action when the Hall Plate is to handle the voltage signal in the ADC blocks No longer consumption electric power.

Then, complete the signal conversion and the numerical data is being stored in the memory block for directly defeated After going out or being further processed in the DAC blocks, the ADC can be turned off.Compared with conventional linear Hall, the new system Electric power of the system consumption less than sub-fraction.And compared with conventional Hall switch, the new system provides survey continuously and without interruption Measure the information in magnetic field.

Brief description of the drawings

Fig. 1 is the block diagram for embodying sensor of the invention system.

Fig. 2 is the exemplary timing diagram of the operation for the sensing system for showing Fig. 1.

Embodiment

Term is defined

In the context of the present invention, the term used in this disclosure generally has it general in technique Logical meaning.Some terms are discussed herein below to provide the extra guiding of the explanation on the present invention to practitioner.It will be understood that, can be with one Plant and identical things is expressed with upper type.Therefore, it can be used and substitute language and synonym.

Sensor element mean in the context of the present invention system or device the purpose is to detect the event in environment Or change and provide the component of correspondence output or signal.Sensor element is normally in response to sensed event and provides electric signal Or visual indicia.Some sensor elements need electric power to be operated, for example:Thermocouple, it is produced in response to temperature Know voltage;CCD, it produces known voltage in response to light;And Hall sensor, it produces known voltage in response to magnetic field. Other sensor elements can not need electric power to be operated, for example mercury, human eye and compass.

Instrument amplifier means the type for being suitable to use in measurement and test equipment in the context of the present invention Difference amplifier.It is typically a type of difference amplifier equipped with input buffer amplifier, and the input is delayed The need for the elimination of device amplifier is rushed to input resistant matching.Additional features include extremely low DC skews, low drifting, low noise, high The when high input impedance of open-loop gain, high common mode inhibition.Instrument amplifier is used for the very big accuracy for needing circuit and steady Qualitatively situation.The amplifier of this type is generally used in Hall Plate sensor.

Analog signal is persistent signal in the context of the present invention, for the persistent signal, the time change of signal Represent a certain other time variable quantity.

Data signal is a type of persistent signal for representing series of discrete value (quantified signal).Data signal is led to Often synonymous with logical signal, the logical signal is the data signal that centrifugal pump has two possible logical values.

Outside stimulus means can be sensed or be surveyed by sensor element outside sensor device in the context of the present invention Measure to produce the environment for the signal for corresponding to measured values.The example of measurable stimulation includes sound, temperature, weight, position, electricity It is different in stream and voltage, light, color, movement velocity, magnetic field, pressure and two dimension and 3 dimensional coil geometry, blood and urine etc. Thing.

Signal adapter means to be converted to the characteristic of signal not from a kind of representation in the context of the present invention The equipment of same representation.In electronic signal converter technology, the signal adapters of most of well-known types be mould/ Number converter (ADC) and D/A converter (DAC).

Electric supply means the electronic installation to load supply AC or DC electric power in the context of the present invention.Electric power is supplied Device is answered to draw its electric power from generator, battery, solar cell etc..In most of electronic installations, supplying electric power is In the DC electric power of the fixed current form under the fixed voltage under variable-current or change voltage.

Memory component includes electronic memory in the context of the present invention, for example:Volatile memory, for example DRAM;Or nonvolatile memory, such as logic latch or flash memory.

Clock is the electronic installation for producing periodic timing signal in the context of the present invention.Clock signal has with every The clock cycle of second or the frequency of circular in definition.The clock signal generally represents by square wave, wherein the part of clock cycle It is turn-off time state for the remainder of turn-on time state and the cycle.The working cycle definitions of clock are turn-on time With the ratio in cycle.

Mean to make device be ready to hold in systems in the context of the present invention from through cancelling state of activation activation device Its designed function of row.This can be by will bring up to predetermined level and complete to the electric supply voltage of device from reduced level Into.

Revocation activation device means temporarily to make for the purpose that (for example) saves electric power in the context of the present invention Device pause performs its designed function.This can by the way that the electric supply voltage to device is fallen below into predetermined level and Complete.In some cases, predetermined level is zero.

Sampling (sample or sampling) means to make sensor element survey stimulation in the context of the present invention Amount.The value (for example, temperature) that the sampling can be stimulated comprising measurement;Or the sampling can add direction, example comprising measurement value Such as speed or polarity (such as magnetic field, voltage or electric current).Sampling is generally controlled by clock (that is, sampling clock).Sampling rate is The certainty factor of the resolution ratio of measurement.

One exemplary embodiment

The magnetic field sensor system of example one

Fig. 1 describes the exemplary sensor system 100 for embodying certain aspects of the invention.The sensing system includes collection Into circuit (IC) chip 101, the IC chip includes the sensor element with the hall effect sensor for measuring magnetic field 102.In such a system, hall effect sensor is through integrated package in IC chip 101;In other systems, Hall effect Sensor can be individual chips.When electric current flowing passes through hall effect sensor and magnetic field is perpendicular to current path, electric current will Deflected according to the right-hand rule and voltage will be produced in sensor.The value and its polarity of produced voltage are electric current flowing and magnetic The value of field and the function in direction.

In integrated circuits, hall effect sensor is miniaturization and produced voltage signal is generally smaller, thus can Need instrument amplifier 103 being incorporated in sensing element 102 to improve signal level.

In this example, in 102 produced by voltage signal be analog signal.As depicted in FIG. 1, this signal is passed To A/D converter (ADC) 104.ADC 104 resolution ratio with its output digit expression and can between 1 to 12 or In the range of even more high;In this example, for diagram purpose, resolution ratio is chosen to be 8.

It is memory component 106 to follow behind ADC, and the memory component stores ADC 104 output.Memory is excellent Selection of land is non-volatile, such as latch or EEPROM, but volatile memory, such as DRAM can also be used.Should at some In, the digital information being stored in memory 104 is final output of the sensing system 100 at output 30.Answered other In, when needing the simulation output in measured magnetic field, the system optionally may be incorporated into D/A converter (DAC) 108, The DAC receives its input from memory and the input is converted into analog form at another output 20.

The system also has time schedule controller element 110, when needing to measure magnetic field, the time schedule controller Element receives outside sensing system 101 at EN pins 10 and enables signal.Time schedule controller element 110 has control from electricity The ON/OFF control unit 1102 for the electric power that power supply 105 is delivered and the clock being timed to ON/OFF action 1104.Being appropriately energized and turning off for various assemblies in sensing system 101 causes the system and the sensing in known technology System is compared to more power efficiency.The function of timing control unit 110 will be explained in the following example.

The SECO of the biosensor systems of example two

Sensing system is enabled to realize that the SECO of very high power efficiency is depicted in Fig. 2 and is incorporated to institute in Fig. 1 In the exemplary biosensor systems 100 described.System activity is started with enabling (EN) clock 201.The frequency of clock 201 by The frequency measured to magnetic field is needed to determine.In this example, the rising edge trigger sensor element 102 of clock 201 with Magnetic field is measured and measured information is presented in the form of analog voltage signal at the output of sensor element.Alternatively The use of the drop edge of clock 201 as triggering is also feasible.

After trigger signal is received, time schedule controller 110 produces clock signal 203 in clock generator 1104.When Activate sensor element 102 to be sampled magnetic field in the rising edge of clock signal 203.And clock pulses 2031 it is lasting when Between the time quantum as necessary to sensor element 102 carries out following operation determine:Obtain one or more samples in magnetic field, in amplification Amplify produced voltage signal (if desired) in device and be delivered to institute's amplified signal and follow behind sensor element 102 ADC 104.

In this exemplary system, the electric current from electric supply 105 to sensor element 102 is about 2.7mA, and this is included The biasing of Hall sensor and powered to amplifier.At the end of clock pulses 2031, sensor is come from the positive transitions of ADC 102 During the analog signal of element, the signal of the ON/OFF controller 1102 in time schedule controller 110 disconnects switch 1021 And cut-out is fed to the electric power of sensor element 102 from electric supply 105.Switch 1021 is kept during pulse length 2032 Disconnect and consume little power in sensor element 102.

Clock generator 1104 further produces second clock signal 205 to activate ADC 104 and make ADC 104 in pulse Activity pattern is in during cycle 2051.ADC 104 remain activity with by the analog signal from sensor element 102 turn It is changed to data signal and the numerical data is delivered to memory 106.In this exemplary system 100, maintain ADC Electric current in activity pattern is 0.3mA.When storing data in memory 104, ON/OFF controller 1102 is in arteries and veins Sent at the drop edge of punching 2051 and to cut off from electric supply 105 be fed to ADC to disconnect the signal of switch 1041 104 electric power.During pulse length 2052, switch 1041 remains open and consumes little power in ADC 104.

Memory 106 shows the information of the measurement containing magnetic field and is ready to the data being delivered to sensing system 100 It is outside.Due to Modern memory device very power efficient, therefore memory can keep being in activity pattern, so as to not interrupt Ground obtains the data.

The optional DAC 108 that numerical data from memory 106 is converted into analog signal also consumes little power, because And in this exemplary system 100, DAC 108 keeps being in activity pattern.It is total that both memory 106 and DAC 108 are consumed Electric power is only 8 μ A.This can be neglected compared with other components of system.By keeping both memory 106 and DAC 108 To be movable, the system can provide the numeral and analogue data in measured magnetic field.

Claims (15)

1. a kind of sensing system, it includes:
Sensor element, it is configured to respond to outside stimulus and produces signal;
First signal adapter, it is configured to receive the signal from the sensing element and converted the signals to Multistation digital signal;
Electric supply, it is configured to the sensing element supply electric power;And
Timing unit, it, which is configured to the sensing element and the signal is delivered to after first signal adapter, subtracts Small the supplied electric power to the sensor element.
2. sensing system according to claim 1, it further comprises the first clock, and first clock is configured to When first converter is in activity pattern, trigger switch is to cut off from the electric supply to the sensor element The electric power.
3. sensing system according to claim 1, it further comprises being configured to store the multistation digital signal Memory cell.
4. sensing system according to claim 3, it further comprises second clock, and the second clock is configured to Trigger switch is to cut off from the electric supply to described after the memory cell stores the multistation digital signal The electric power of first signal adapter.
5. sensing system according to claim 1, wherein the sensor element includes Hall sensor and amplifier.
6. sensing system according to claim 5, wherein the Hall sensor, the amplifier, described first turn Parallel operation, the memory cell are the part of IC chip.
7. sensing system according to claim 6, it further comprises being configured to turning the multistation digital signal It is changed to the secondary signal converter of analog signal.
8. sensing system according to claim 7, it further comprises that be coupled to the memory cell first is defeated Go out terminal and be coupled to the second lead-out terminal of the secondary signal converter.
9. sensing system according to claim 8, it further comprises being configured to activate the sensor element Enable clock.
10. a kind of method, it includes
In response to outside stimulus signal is produced from sensor element;
Convert the signals to multistation digital signal;And
The electric power of the sensing element is reduced to when the signal is just changed.
11. method according to claim 10, wherein the step that reduces includes being cut to the electricity of the sensor element Power.
12. method according to claim 10, it further comprises the multistation digital signal being stored in memory list In member.
13. method according to claim 12, it further comprises the multistation digital signal being stored in described deposit The electric power of first converter is cut to after in storage unit.
14. method according to claim 10, wherein the sensor element includes Hall sensor and amplifier.
15. method according to claim 14, wherein the generation step, the switch process and the cut-out step are equal Performed in an IC chip.
CN201580059568.3A 2014-11-07 2015-11-19 Hall sensor chip with SECO CN107076807A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/929,157 US10191505B2 (en) 2014-11-07 2015-10-30 Hall sensor chip with timing control
US14/929,157 2015-10-30
PCT/US2015/058693 WO2016073386A1 (en) 2014-11-07 2015-11-19 Hall sensor chip with timing control

Publications (1)

Publication Number Publication Date
CN107076807A true CN107076807A (en) 2017-08-18

Family

ID=59617801

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580059568.3A CN107076807A (en) 2014-11-07 2015-11-19 Hall sensor chip with SECO

Country Status (1)

Country Link
CN (1) CN107076807A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5822369A (en) * 1994-09-13 1998-10-13 Mitsubishi Denki Kabushiki Kaisha Sensor device
CN2919403Y (en) * 2006-06-12 2007-07-04 彭伟杰 Wireless remote control pressure water-level monitoring insturment
US20070290701A1 (en) * 2006-06-14 2007-12-20 Nguyen Don J Low-power battery pack with hall-effect sensor
CN101688881A (en) * 2007-06-25 2010-03-31 阿莱戈微系统公司 Low power magnetic field sensor
US7768254B1 (en) * 2007-10-23 2010-08-03 Exaflop Llc Server power measurement
US20110133723A1 (en) * 2009-12-07 2011-06-09 Austriamicrosystems Ag Sensor Arrangement and Method for Operating a Sensor Arrangement
US20130076351A1 (en) * 2011-09-26 2013-03-28 Samsung Electro-Mechanics Co., Ltd. Metering device and metering method
CN103900656A (en) * 2012-12-28 2014-07-02 陕西多奇电子科技有限公司 Intelligent water level temperature sensor
CN104900068A (en) * 2015-06-04 2015-09-09 交通运输部科学研究院 Vehicle detector, method for intermittent and variable-frequency power supply, and method for reducing power consumption of wireless transceiver module

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5822369A (en) * 1994-09-13 1998-10-13 Mitsubishi Denki Kabushiki Kaisha Sensor device
CN2919403Y (en) * 2006-06-12 2007-07-04 彭伟杰 Wireless remote control pressure water-level monitoring insturment
US20070290701A1 (en) * 2006-06-14 2007-12-20 Nguyen Don J Low-power battery pack with hall-effect sensor
CN101688881A (en) * 2007-06-25 2010-03-31 阿莱戈微系统公司 Low power magnetic field sensor
US7768254B1 (en) * 2007-10-23 2010-08-03 Exaflop Llc Server power measurement
US20110133723A1 (en) * 2009-12-07 2011-06-09 Austriamicrosystems Ag Sensor Arrangement and Method for Operating a Sensor Arrangement
US20130076351A1 (en) * 2011-09-26 2013-03-28 Samsung Electro-Mechanics Co., Ltd. Metering device and metering method
CN103900656A (en) * 2012-12-28 2014-07-02 陕西多奇电子科技有限公司 Intelligent water level temperature sensor
CN104900068A (en) * 2015-06-04 2015-09-09 交通运输部科学研究院 Vehicle detector, method for intermittent and variable-frequency power supply, and method for reducing power consumption of wireless transceiver module

Similar Documents

Publication Publication Date Title
US9419611B2 (en) Low-power activation circuit with motion sensor
TWI507668B (en) System and method for monitoring temperature
US4969363A (en) Electromagnetic flowmeter capable of simultaneous measurement of flow rate and conductivity of fluid
DE19701261C2 (en) Method for detecting passing magnetic articles with a speed close to zero
US9354193B2 (en) Apparatus for measuring the electrical conductivity of a liquid medium
US6690590B2 (en) Apparatus for regulating the delivery of power from a DC power source to an active or passive load
ES2330345T3 (en) Device for measuring alternate current and / or continuous current.
CN102027382B (en) Techniques for measuring voltages in a circuit
EP1042651B1 (en) Electrode integrity checking
US9151806B2 (en) Reading circuit for a magnetic field sensor with sensitivity calibration, and related reading method
US6808307B1 (en) Time-interleaved sampling of voltages for improving accuracy of temperature remote sensors
JP2814362B2 (en) High precision voltage measuring device
DE102011102483A1 (en) Method for operating a Hall sensor arrangement and Hall sensor arrangement
CN104283559B (en) Built-in self-test for analog-digital converter
US7071677B2 (en) Accurate and efficient sensing method for bi-directional signals
CN102292717B (en) An isolated current to voltage, voltage to voltage converter
US9354261B2 (en) Duty cycle detecting circuit for pulse width modulation
US4931775A (en) Plant watering need monitor
US20110282600A1 (en) System and method for photovoltaic plant power curve measurement and health monitoring
EP2073024A1 (en) A digital multimeter with automatic measurement selection function
CN105588584B (en) Digital sensor system
US20020117009A1 (en) Flowmeter fault detection
US6637934B1 (en) Constant offset buffer for reducing sampling time in a semiconductor temperature sensor
TWI403705B (en) Temperature measurement system and related method
US20070188971A1 (en) Circuit diagnostics from flame sensing ac component

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination