CN116196005A - Electrocardiosignal detection circuit - Google Patents
Electrocardiosignal detection circuit Download PDFInfo
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- CN116196005A CN116196005A CN202211614509.6A CN202211614509A CN116196005A CN 116196005 A CN116196005 A CN 116196005A CN 202211614509 A CN202211614509 A CN 202211614509A CN 116196005 A CN116196005 A CN 116196005A
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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
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/30—Input circuits therefor
- A61B5/307—Input circuits therefor specially adapted for particular uses
- A61B5/308—Input circuits therefor specially adapted for particular uses for electrocardiography [ECG]
Abstract
The application provides an electrocardiosignal detection circuit, including: an analog-to-digital converter and a set of detection electrodes. The first ends of at least two detection electrodes included in the detection electrode set are respectively connected with different parts of the detected object, the second ends of at least two detection electrodes included in the detection electrode set are connected with one end of the analog-to-digital converter, and the third ends of at least two detection electrodes included in the detection electrode set are grounded with the other end of the analog-to-digital converter. At least two detection electrodes included in the detection electrode set generate a lead signal corresponding to the subject. Since the lead signals comprise analog electrocardiosignals of different parts of the detected object. When the analog-to-digital converter can generate the lead signals between different detection electrodes, the analog-to-digital converter can directly convert the analog electrocardiosignals in the lead signals into digital electrocardiosignals because the input impedance of the analog-to-digital converter is larger than a first threshold value, so that the cost of an integrated circuit and the complexity of a signal chain are saved.
Description
Technical Field
The invention relates to the technical field of integrated circuits, in particular to an electrocardiosignal detection circuit.
Background
An Electrocardiogram (ECG) is one of important monitoring indexes of a human body, which is obtained by collecting an electrocardiographic signal of each cardiac cycle of a heart from a body surface of a subject by using an electrocardiographic measurement circuit and then generating an electrical activity change pattern according to the electrocardiographic signal of each cardiac cycle. Therefore, in order to be able to detect whether or not the subject is healthy by means of an electrocardiogram in time, it is necessary to measure the cardiac signal of the subject.
In this case, a scheme capable of detecting an electrocardiograph signal is currently needed.
Disclosure of Invention
In order to overcome the technical problems in the prior art, an electrocardiosignal detection circuit capable of detecting electrocardiosignals is provided.
In a first aspect, the present application provides an electrocardiograph signal detection circuit, comprising: an analog-to-digital converter and a set of detection electrodes;
the input impedance of the analog-to-digital converter is greater than a first threshold;
the first ends of at least two detection electrodes included in the detection electrode set are respectively connected with different parts of the detected object, the second ends of at least two detection electrodes included in the detection electrode set are connected with one end of the analog-to-digital converter, and the third ends of at least two detection electrodes included in the detection electrode set are grounded with the other end of the analog-to-digital converter;
at least two detection electrodes included in the detection electrode set are used for generating lead signals corresponding to the detected object, wherein the lead signals comprise simulated electrocardiosignals of different parts of the detected object;
and the analog-to-digital converter is used for converting analog electrocardiosignals in the lead signals into digital electrocardiosignals when the lead signals are generated between different detection electrodes.
In one embodiment, the detection electrodes in the set of detection electrodes include a first electrode and a second electrode;
the first end of the first electrode and the first end of the second electrode are respectively connected with different parts of the detected object;
the second end of the first electrode is connected with the first end of the analog-to-digital converter, the second end of the second electrode is connected with the second end of the analog-to-digital converter, and the third end of the second electrode is grounded with the third end of the analog-to-digital converter.
In one embodiment, the first end of the analog-to-digital converter is a positive electrode, and the second end of the analog-to-digital converter is a negative electrode; the second end of the first electrode is a positive electrode, and the second end of the second electrode is a negative electrode.
In one embodiment, the first end of the first electrode is connected with the left upper limb of the tested object and is used for detecting electrocardiosignals corresponding to the left upper limb of the tested object;
the first end of the second electrode is connected with the right upper limb of the detected object and is used for detecting electrocardiosignals corresponding to the right upper limb of the detected object.
In one embodiment, the first end of the first electrode is connected with the right upper limb of the detected object and is used for detecting electrocardiosignals corresponding to the right upper limb of the detected object;
the first end of the second electrode is connected with the left upper limb of the detected object and is used for detecting electrocardiosignals corresponding to the left upper limb of the detected object.
In one embodiment, the first end of the first electrode is connected with the left upper limb of the tested object and is used for detecting electrocardiosignals corresponding to the left upper limb of the tested object;
the first end of the second electrode is connected with the right lower limb of the detected object and is used for detecting electrocardiosignals corresponding to the right lower limb of the detected object.
In one embodiment, the fourth terminal of the analog-to-digital converter is connected to the display device for transmitting the digital electrocardiographic signal to the display device to cause the display device to display an electrocardiogram.
In a second aspect, the present application provides an electrocardiograph signal detection circuit, including: the device comprises an analog-to-digital converter, a detection electrode set and a common mode feedback module;
the input impedance of the analog-to-digital converter is greater than a first threshold;
the first ends of at least two first detection electrodes included in the detection electrode set are respectively connected with different parts of the detected object, and the second ends of the first detection electrodes are connected with one end of the analog-to-digital converter;
the other end of the analog-to-digital converter is connected with one end of a common mode feedback module, the other end of the common mode feedback module is connected with a first end of a second type of detection electrode included in the detection electrode set, and the second end of the second type of detection electrode is connected with a target part of a detected object;
the detection electrode set is used for generating lead signals corresponding to the detected object, wherein the lead signals comprise analog electrocardiosignals of different parts of the detected object; the lead signals include a first lead signal between the first type of detection electrodes and a second lead signal between the first type of detection electrodes and the second type of detection electrodes; the first lead signal is a potential difference signal generated between the first type of detection electrodes, and the second lead signal is a potential difference signal generated between the first type of detection electrodes and the second type of detection electrodes;
the analog-to-digital converter is used for converting the analog electrocardiosignals in the lead signals into digital electrocardiosignals;
and the common mode feedback module is used for balancing the output orders of the first lead signal and the second lead signal.
In one embodiment, a first type of detection electrode in the set of detection electrodes includes a first electrode and a second electrode; the first end of the first electrode and the first end of the second electrode are respectively connected with different parts of the detected object; the second end of the first electrode is connected with the first end of the analog-to-digital converter, and the second end of the second electrode is connected with the second end of the analog-to-digital converter;
a first electrode for connection to the left upper limb of the subject;
a second electrode for connection to the right upper limb of the subject;
and the second type of detection electrode is used for being connected with the right lower limb of the detected object.
In one embodiment, the common mode feedback module is a common mode feedback circuit.
According to the technical scheme, the application provides an electrocardiosignal detection circuit, which comprises: an analog-to-digital converter and a set of detection electrodes. The first ends of at least two detection electrodes in the detection electrode set are respectively connected with different parts of the detected object, the second ends of at least two detection electrodes in the detection electrode set are connected with one end of the analog-to-digital converter, and the third ends of at least two detection electrodes in the detection electrode set are grounded with the other end of the analog-to-digital converter. At least two detection electrodes included in the detection electrode set are capable of generating a lead signal corresponding to the subject. Since the lead signal comprises analog electrocardiosignals of different parts of the detected object. The analog-to-digital converter can convert analog electrocardiosignals in the lead signals into digital electrocardiosignals when the lead signals are generated between different detection electrodes. Through the circuit that this application provided, can realize the detection to the electrocardiosignal. Further, the circuit provided by the application is simple in structure and low in cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a conventional electrocardiosignal acquisition device;
fig. 2 is a schematic structural diagram of a central electric signal detection circuit according to a first embodiment of the present application;
fig. 3 is a schematic structural diagram of a central electric signal detection circuit according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of a central electric signal detection circuit according to a third embodiment of the present application;
fig. 5 is a schematic structural diagram of a center electric signal detection circuit according to a fourth embodiment of the present application;
fig. 6 is a schematic structural diagram of a center electric signal detection circuit according to a fifth embodiment of the present application;
fig. 7 is a schematic structural diagram of a center electric signal detection circuit according to a sixth embodiment of the present application;
fig. 8 is a schematic structural diagram of a center electric signal detection circuit according to a seventh embodiment of the present application;
fig. 9 is a schematic structural diagram of a center electric signal detection circuit according to an eighth embodiment of the present application.
Reference numerals:
10-an electrocardiosignal detection circuit; a display device-20; a 100-analog-to-digital converter; 110-a set of detection electrodes;
111-a first electrode; 112-a second electrode;
20-an electrocardiosignal detection circuit; a 100-analog-to-digital converter; 110-a set of detection electrodes;
a 120-common mode feedback module; 111-a first type of detection electrode; 112-a second type detection electrode;
1111—a first electrode; 1112-a second electrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The reference numerals used for the components in this application, such as "first," "second," etc., are used merely to distinguish between the described objects, and do not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The traditional electrocardiosignal testing method can adopt a traditional electrocardiosignal acquisition device to acquire the electrocardiosignal of the target object. The conventional electrocardiosignal acquisition device may be shown in fig. 1, and generally comprises a left electrode a, a right electrode b and a right leg electrode c, which are used for being connected with a detected object, wherein the left electrode a and the right electrode b can be connected with an instrument amplifier d, after the electrocardiosignal is amplified by the instrument amplifier d, an analog filter circuit e is adopted for filtering and noise reduction, and after the filtered analog electrocardiosignal is transmitted to an analog-to-digital converter f for analog-to-digital conversion, so as to obtain a digital electrocardiosignal. However, in the conventional electrocardiosignal acquisition device, because the input impedance of the instrument amplifier and the common mode rejection ratio are required to be higher, the expensive instrument amplifier needs to be adopted, and meanwhile, the laser trimming technology needs to be adopted to improve the common mode rejection ratio, so that the problem of higher cost exists. Therefore, how to use an electrocardiographic signal detection circuit with low cost becomes the direction of research.
Based on this, the embodiment of the application provides an electrocardiosignal detection circuit, which comprises: an analog-to-digital converter and a set of detection electrodes. The first ends of at least two detection electrodes in the detection electrode set are respectively connected with different parts of the detected object, the second ends of at least two detection electrodes in the detection electrode set are connected with one end of the analog-to-digital converter, and the third ends of at least two detection electrodes in the detection electrode set are grounded with the other end of the analog-to-digital converter. At least two detection electrodes included in the detection electrode set are capable of generating a lead signal corresponding to the subject. Since the lead signal comprises analog electrocardiosignals of different parts of the detected object. The analog-to-digital converter can convert analog electrocardiosignals in the lead signals into digital electrocardiosignals when the lead signals are generated between different detection electrodes.
Therefore, by the circuit provided by the application, the detection of electrocardiosignals can be realized. Furthermore, since the input impedance of the analog-to-digital converter in the circuit provided by the application is larger than the first threshold value, the method for further processing the lead signal and noise reduction by the instrument amplifier and the analog filter circuit in the traditional technology are not needed, the structure is simple, the cost is low, and the space and the complexity of the integrated circuit can be reduced while the cost is saved.
In order to achieve the above objective, the technical solutions provided in the embodiments of the present application are described in detail below, with reference to the accompanying drawings.
Referring to fig. 2, an electrocardiograph signal detection circuit 10 provided for an embodiment of the present application includes an analog-to-digital converter 100 and a detection electrode set 110, where an input impedance of the analog-to-digital converter 100 is greater than a first threshold.
The first ends of at least two detection electrodes included in the detection electrode set 110 are respectively connected with different parts of the detected object, the second ends of at least two detection electrodes included in the detection electrode set 110 are connected with one end of the analog-to-digital converter 100, and the third ends of at least two detection electrodes included in the detection electrode set 110 are grounded with the other end of the analog-to-digital converter 100.
At least two detection electrodes included in the set of detection electrodes 110 are used to generate lead signals corresponding to the subject, the lead signals including simulated electrocardiographic signals of different portions of the subject.
The lead signal is a potential difference signal generated when the two detection electrodes are turned on. The two detection electrodes can be connected with different parts of the detected object, when the two detection electrodes are conducted with the channel between the analog-to-digital converter 100, a potential difference is generated between the two detection electrodes, namely a lead signal is generated, and the lead signal can embody analog electrocardiosignals of different parts of the detected object. The lead signal at this time is a high impedance input signal, and thus the input impedance of the analog-to-digital converter 100 needs to be greater than the first threshold. Alternatively, the first threshold may be 1Gohm.
In an alternative embodiment, as shown in FIG. 3, the detection electrodes in the set of detection electrodes 110 include a first electrode 111 and a second electrode 112.
The first end of the first electrode 111 and the first end of the second electrode 112 are connected to different portions of the subject, respectively.
The first electrode 111 and the second electrode 112 may be metal connection points, metal connection pins, or the like, which is not limited herein. The first electrode 111 and the second electrode 112 may be connected to electrode pads, respectively, and when the electrode pads contact different parts of the subject, the first end of the first electrode 111 and the second end of the second electrode 112 are connected to the different parts of the subject, respectively.
The second end of the first electrode 111 is connected to the first end of the analog-to-digital converter 100, the second end of the second electrode 112 is connected to the second end of the analog-to-digital converter 100, and the third end of the second electrode 112 is grounded to the third end of the analog-to-digital converter 100.
In the embodiment of the application, two detection electrodes are directly connected with the analog-to-digital converter 100 capable of receiving high impedance to obtain digital electrocardiosignals, so that the electrocardiosignals are detected. Furthermore, since the input impedance of the analog-to-digital converter in the circuit provided by the application is larger than the first threshold value, the method for further processing the lead signal and noise reduction by the instrument amplifier and the analog filter circuit in the traditional technology are not needed, the structure is simple, the cost is low, and the space and the complexity of the integrated circuit can be reduced while the cost is saved. In addition, the third terminal of the second electrode 112 and the third terminal of the analog-to-digital converter 100 are grounded, so that the voltage of the first electrode 111 and the voltage of the second electrode 112 can be maintained at the same level, and the common mode part between the first electrode 111 and the second electrode 112 can be consistent with the grounding of the circuit.
The analog-to-digital converter 100 is used for converting analog electrocardiosignals in the lead signals into digital electrocardiosignals when the lead signals are generated between different detection electrodes.
When the detection electrode set 110 collects electrocardiographic signals of different objects to be detected, the electrocardiographic signals collected at this time are analog signals, and the analog signals need to be converted into digital signals for observation.
When the electrocardiosignals are detected, the electrocardiosignals reflected by different parts of the detected object can be detected, and a plurality of different connection modes can be adopted to detect the lead signals when the electrodes of the different parts are conducted.
The first end of the analog-to-digital converter 100 may be a positive electrode, and the second end of the analog-to-digital converter 100 may be a negative electrode. The second end of the first electrode 111 may be a positive electrode, and the second end of the second electrode 112 may be a negative electrode.
As another implementation, the first end of the analog-to-digital converter 100 may be a negative electrode, the second end of the analog-to-digital converter 100 may be a positive electrode, the second end of the corresponding first electrode 111 may be a negative electrode, and the second end of the second electrode 112 may be a positive electrode, which is not limited herein. And various connection modes can be flexibly realized.
In an alternative implementation, as shown in fig. 4, the connection manner between the detection electrode set 110 and the object under test may include: the first end of the first electrode 111 is connected to the upper left limb of the subject, and is used for detecting an electrocardiosignal corresponding to the upper left limb of the subject;
the first end of the second electrode 112 is connected to the right upper limb of the subject, and is used for detecting an electrocardiographic signal corresponding to the right upper limb of the subject.
In another alternative implementation, as shown in fig. 5, a first end of the first electrode 111 is connected to a right upper limb of the subject, and is used for detecting an electrocardiographic signal corresponding to the right upper limb of the subject;
the first end of the second electrode 112 is connected to the left upper limb of the subject, and is used for detecting an electrocardiographic signal corresponding to the left upper limb of the subject.
In other alternative implementations, as shown in fig. 6, a first end of the first electrode 111 is connected to a left upper limb of the subject, and is used for detecting an electrocardiographic signal corresponding to the left upper limb of the subject;
the first end of the second electrode 112 is connected to the right lower limb of the subject, and is used for detecting an electrocardiographic signal corresponding to the right lower limb of the subject.
In this application embodiment, can adopt multiple different connected mode, realize the collection of electrocardiosignal, the electrocardiosignal detection circuit 10 of this application's flexibility is high, and integrated circuit simple structure simultaneously, with low costs, the space volume that occupies is little.
Further, after the analog-to-digital converter 100 converts the analog electrocardiograph signal into the digital electrocardiograph signal, the digital electrocardiograph signal may be transmitted to the external display device 20, so that the display device 20 displays an electrocardiogram corresponding to the digital electrocardiograph signal. As shown in fig. 7, the fourth terminal of the analog-to-digital converter 100 is connected to the display device 20 for transmitting the digital electrocardiographic signal to the display device 20, so that the display device 20 displays an electrocardiogram. The electrocardiogram can be visually displayed by the display device 20 for convenient observation.
In the embodiment of the present application, the electrocardiograph signal detection circuit 10 includes: an analog-to-digital converter 100 and a set of detection electrodes 110. The first ends of at least two detection electrodes included in the detection electrode set 110 are respectively connected with different parts of the detected object, the second ends of at least two detection electrodes included in the detection electrode set 110 are connected with one end of the analog-to-digital converter 100, and the third ends of at least two detection electrodes included in the detection electrode set 110 are grounded with the other end of the analog-to-digital converter 100. At least two detection electrodes included in the detection electrode set 110 are capable of generating a lead signal corresponding to a subject. Since the lead signal comprises analog electrocardiosignals of different parts of the detected object. The analog-to-digital converter 100 may then convert the analog electrocardiographic signals in the lead signals to digital electrocardiographic signals when the lead signals are generated between the different detection electrodes. Therefore, by the circuit provided by the application, the detection of electrocardiosignals can be realized. Furthermore, since the input impedance of the analog-to-digital converter in the circuit provided by the application is larger than the first threshold value, the method for further processing the lead signal and noise reduction by the instrument amplifier and the analog filter circuit in the traditional technology are not needed, the structure is simple, the cost is low, and the space and the complexity of the integrated circuit can be reduced while the cost is saved.
Based on the same inventive concept, the present application further provides an electrocardiograph signal detection circuit 30, as shown in fig. 8, including: an analog-to-digital converter 100, a set of detection electrodes 110, and a common mode feedback module 120. Wherein the input impedance of the analog-to-digital converter 100 is greater than the first threshold.
The first ends of at least two first-type detection electrodes 111 included in the detection electrode set 110 are respectively connected to different parts of the object to be detected, and the second ends of the first-type detection electrodes 111 are connected to one end of the analog-to-digital converter 100.
The other end of the analog-to-digital converter 100 is connected to one end of the common mode feedback module 120, the other end of the common mode feedback module 120 is connected to a first end of the second type detection electrode 112 included in the detection electrode set 110, and the second end of the second type detection electrode 112 is connected to a target portion of the object to be detected.
The lead signal is a potential difference signal generated when the first type detection electrode 111 and the second type detection electrode 112 are turned on. The first type detection electrode 111 and the second type detection electrode 112 may be connected to different portions of the subject. When the channel between the detection electrode set 110 and the analog-to-digital converter 100 is on, a potential difference is generated between the detection electrodes connected to different parts of the detected object, that is, a lead signal is generated, and the lead signal can represent analog electrocardiographic signals of different parts of the detected object. The lead signal at this time is a high impedance input signal, and thus the input impedance of the analog-to-digital converter 100 needs to be greater than the first threshold. Alternatively, the first threshold may be 1Gohm.
The detection electrode set 110 is configured to generate a lead signal corresponding to the subject, where the lead signal includes analog electrocardiographic signals of different portions of the subject. The lead signals include a first lead signal between the first type of detection electrodes 111 and a second lead signal between the first type of detection electrodes 111 and the second type of detection electrodes 112. The first lead signal is a potential difference signal generated between the first type detection electrodes 111, and the second lead signal is a potential difference signal generated between the first type detection electrodes 111 and the second type detection electrodes 112.
Further, as shown in fig. 9, the first type of detection electrode 111 in the detection electrode set 110 includes a first electrode 1111 and a second electrode 1112. The first end of the first electrode 1111 and the first end of the second electrode 1112 are connected to different parts of the subject, respectively. A second end of the first electrode 1111 is connected to a first end of the analog-to-digital converter 100, and a second end of the second electrode 1112 is connected to a second end of the analog-to-digital converter 100.
Wherein the first electrode 1111 is for connection with the left upper limb of the subject.
Wherein, the second electrode 1112 is used for connecting with the right upper limb of the detected object;
the second type of detection electrode 112 is used for being connected with the right lower limb of the detected object.
In the embodiment of the application, the detection electrode set 110 is used for realizing the connection with different parts of the detected object, and meanwhile, an instrument amplifier and an analog filter circuit in the traditional technology are not needed, so that the cost is saved.
The analog-to-digital converter 100 is configured to convert an analog electrocardiographic signal in the lead signal into a digital electrocardiographic signal.
When the detection electrode set 110 collects electrocardiographic signals of different objects to be detected, the electrocardiographic signals collected at this time are analog signals, and the analog signals need to be converted into digital signals for observation.
The common mode feedback module 120 is configured to balance the output magnitudes of the first lead signal and the second lead signal.
It should be noted that, since the common mode component needs to be returned to the human body through the electrode connected to the right leg of the subject to be tested, so as to realize the common mode of the first type detection electrode 111 and the second type detection electrode 112, the common mode feedback module 120 may be provided, so as to balance the output magnitudes of the first lead signal and the second lead signal to realize the common mode. The common mode feedback module 120 herein may be a common mode feedback circuit.
In the embodiment of the application, the electrocardiosignal can be detected through the circuit provided by the application. Furthermore, since the input impedance of the analog-to-digital converter in the circuit provided by the application is larger than the first threshold value, the method for further processing the lead signal and noise reduction by the instrument amplifier and the analog filter circuit in the traditional technology are not needed, the structure is simple, the cost is low, and the space and the complexity of the integrated circuit can be reduced while the cost is saved.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It should be noted that, in a scenario requiring high impedance testing (not limited to a scenario requiring high impedance testing of a sensor signal), that is, in a case where the acquired electrical signal is a high impedance signal, the electrocardiograph signal detection circuit provided in the application may be used for electrocardiograph signal detection, and besides the electrocardiograph signal detection circuit may also connect an electrode in the electrocardiograph signal detection circuit with other devices that generate high impedance electrical signals, so that the analog-to-digital converter may convert the acquired high impedance electrical signals from analog electrical signals to digital signal signals.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. An electrocardiograph signal detection circuit, comprising: an analog-to-digital converter and a set of detection electrodes;
the input impedance of the analog-to-digital converter is greater than a first threshold;
the first ends of at least two detection electrodes included in the detection electrode set are respectively connected with different parts of an object to be detected, the second ends of at least two detection electrodes included in the detection electrode set are connected with one end of the analog-to-digital converter, and the third ends of at least two detection electrodes included in the detection electrode set are grounded with the other end of the analog-to-digital converter;
the at least two detection electrodes included in the detection electrode set are used for generating lead signals corresponding to the detected object, and the lead signals comprise analog electrocardiosignals of different parts of the detected object;
the analog-to-digital converter is used for converting the analog electrocardiosignals in the lead signals into digital electrocardiosignals when the lead signals are generated between different detection electrodes.
2. The electrocardiographic signal detection circuit according to claim 1 wherein the detection electrodes in the set of detection electrodes include a first electrode and a second electrode;
the first end of the first electrode and the first end of the second electrode are respectively connected with different parts of the detected object;
the second end of the first electrode is connected with the first end of the analog-to-digital converter, the second end of the second electrode is connected with the second end of the analog-to-digital converter, and the third end of the second electrode is grounded with the third end of the analog-to-digital converter.
3. The electrocardiograph signal detection circuit according to claim 2, wherein a first end of the analog-to-digital converter is a positive electrode, and a second end of the analog-to-digital converter is a negative electrode; the second end of the first electrode is an anode, and the second end of the second electrode is a cathode.
4. The electrocardiosignal detection circuit of claim 3 wherein,
the first end of the first electrode is connected with the left upper limb of the detected object and is used for detecting electrocardiosignals corresponding to the left upper limb of the detected object;
the first end of the second electrode is connected with the right upper limb of the detected object and used for detecting electrocardiosignals corresponding to the right upper limb of the detected object.
5. The electrocardiosignal detection circuit of claim 3 wherein,
the first end of the first electrode is connected with the right upper limb of the detected object and is used for detecting electrocardiosignals corresponding to the right upper limb of the detected object;
the first end of the second electrode is connected with the left upper limb of the detected object and used for detecting electrocardiosignals corresponding to the left upper limb of the detected object.
6. The electrocardiosignal detection circuit of claim 3 wherein,
the first end of the first electrode is connected with the left upper limb of the detected object and is used for detecting electrocardiosignals corresponding to the left upper limb of the detected object;
the first end of the second electrode is connected with the right lower limb of the detected object and used for detecting electrocardiosignals corresponding to the right lower limb of the detected object.
7. The electrical cardiac signal detection circuit as recited in any one of claims 1-6, wherein the fourth terminal of the analog-to-digital converter is coupled to a display device for transmitting the digital cardiac signal to the display device for causing the display device to display an electrocardiogram.
8. An electrocardiograph signal detection circuit, comprising: the device comprises an analog-to-digital converter, a detection electrode set and a common mode feedback module;
the input impedance of the analog-to-digital converter is greater than a first threshold;
the first ends of at least two first detection electrodes included in the detection electrode set are respectively connected with different parts of a detected object, and the second ends of the first detection electrodes are connected with one end of the analog-to-digital converter;
the other end of the analog-to-digital converter is connected with one end of the common mode feedback module, the other end of the common mode feedback module is connected with the first end of a second type of detection electrode included in the detection electrode set, and the second end of the second type of detection electrode is connected with the target part of the detected object;
the detection electrode set is used for generating lead signals corresponding to the detected object, and the lead signals comprise analog electrocardiosignals of different parts of the detected object; the lead signals include a first lead signal between the first type of detection electrodes and a second lead signal between the first type of detection electrodes and the second type of detection electrodes; the first lead signal is a potential difference signal generated between the first type of detection electrodes, and the second lead signal is a potential difference signal generated between the first type of detection electrodes and the second type of detection electrodes;
the analog-to-digital converter is used for converting the analog electrocardiosignals in the lead signals into digital electrocardiosignals;
the common mode feedback module is used for balancing the output magnitude of the first lead signal and the second lead signal.
9. The electrical cardiac signal detection circuit as recited in claim 8, wherein a first type of detection electrode in the set of detection electrodes comprises a first electrode and a second electrode; the first end of the first electrode and the first end of the second electrode are respectively connected with different parts of the detected object; the second end of the first electrode is connected with the first end of the analog-to-digital converter, and the second end of the second electrode is connected with the second end of the analog-to-digital converter;
the first electrode is used for being connected with the left upper limb of the detected object;
the second electrode is used for being connected with the right upper limb of the detected object;
the second type detection electrode is used for being connected with the right lower limb of the detected object.
10. The electrical cardiac signal detection circuit of claim 8, wherein the common mode feedback module is a common mode feedback circuit.
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| CN202211614509.6A CN116196005A (en) | 2022-12-13 | 2022-12-13 | Electrocardiosignal detection circuit |
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