CN219611764U - Signal acquisition circuit and chip - Google Patents
Signal acquisition circuit and chip Download PDFInfo
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- CN219611764U CN219611764U CN202320539448.5U CN202320539448U CN219611764U CN 219611764 U CN219611764 U CN 219611764U CN 202320539448 U CN202320539448 U CN 202320539448U CN 219611764 U CN219611764 U CN 219611764U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The present disclosure relates to a signal acquisition circuit and a chip, the signal acquisition circuit includes a triangular wave generation circuit, a voltage conversion circuit and a signal comparison circuit, the signal comparison circuit includes a comparator; the input end of the voltage conversion circuit is used for being electrically connected with the power consumption equipment, so that the input end of the voltage conversion circuit inputs an analog signal to be tested of the power consumption equipment, and the output end of the voltage conversion circuit is connected with the first input end of the comparator; the output end of the triangular wave generating circuit is connected with the second input end of the comparator. Through the signal acquisition circuit, a chip for analog-to-digital conversion is not required, but the converted analog signal to be detected of the power consumption equipment can be compared with the triangular wave to obtain the PWM waveform reflecting the voltage signal, so that the analog signal to be detected is determined based on the PWM waveform, the process is not limited by a chip communication protocol, and the signal acquisition efficiency can be improved on the basis of reducing the cost.
Description
Technical Field
The present disclosure relates to the field of electronic circuits, and in particular, to a signal acquisition circuit and a chip.
Background
At present, the power consumption of the electronic product can be obtained through the controller of the electronic product, so that under the condition that the actual power consumption of the electronic product exceeds the rated power of a power supply and the heat dissipation requirement, corresponding limiting measures are adopted to reduce the power consumption, and the stability of the electronic product is ensured.
Related art generally adopts an ADC (Analog-to-digital converter) dedicated chip to convert Analog signals such as voltage or current of an electronic product into digital signals, and then transmits the digital signals to a controller through a chip communication protocol such as I2C or SPI, thereby realizing the acquisition of actual power consumption of the electronic product from the controller. However, the cost of the ADC-specific chip is high, and the transmission rate is limited by the chip communication protocol.
Disclosure of Invention
The disclosure aims to provide a signal acquisition circuit and a chip, so as to improve the signal acquisition efficiency on the basis of reducing the cost.
In order to achieve the above object, a first aspect of the embodiments of the present disclosure provides a signal acquisition circuit including a triangular wave generation circuit, a voltage conversion circuit, and a signal comparison circuit including a comparator;
the input end of the voltage conversion circuit is used for being electrically connected with power consumption equipment, so that the input end of the voltage conversion circuit inputs an analog signal to be tested of the power consumption equipment, and the output end of the voltage conversion circuit is connected with the first input end of the comparator;
the output end of the triangular wave generating circuit is connected with the second input end of the comparator.
Optionally, the voltage conversion circuit includes a sampling resistor and a first voltage proportional amplifying circuit;
the sampling resistor is used for being connected with the power consumption equipment in series;
the first voltage proportional amplifying circuit is used for amplifying the voltage of the sampling resistor and transmitting the amplified first voltage signal to the first input end of the comparator.
Optionally, the voltage conversion circuit includes a second voltage scaling circuit;
the second voltage proportional amplifying circuit is used for amplifying the voltage of the power consumption equipment and transmitting the amplified second voltage signal to the first input end of the comparator.
Optionally, the voltage conversion circuit includes a voltage dividing resistor and a grounding resistor;
the first end of the voltage dividing resistor is connected with the grounding resistor and the first input end of the comparator respectively, and the second end of the voltage dividing resistor is connected with the power consumption equipment in series.
Optionally, the triangle wave generating circuit comprises a resistor and a capacitor;
the first end of the resistor is used for being connected with the controller, and the second end of the resistor is respectively connected with the first end of the capacitor and the second input end of the comparator;
the second end of the capacitor is grounded.
Optionally, the signal acquisition circuit further comprises a controller;
the controller is connected with the output end of the comparator.
Optionally, the controller is further connected to an input terminal of the triangular wave generating circuit.
Optionally, the sampling resistor is a precision resistor.
Optionally, the first voltage proportional amplifying circuit includes a capacitor and an operational amplifier;
the capacitor is connected in parallel with the operational amplifier.
A second aspect of an embodiment of the present disclosure provides a chip integrated with the signal acquisition circuit of any one of the first aspects.
According to the technical scheme, the triangular wave is output by the triangular wave generating circuit, the voltage converting circuit converts the analog signal to be tested of the power consumption equipment, so that the converted voltage signal with the voltage value within the range of the voltage amplitude of the triangular wave is output, on the basis, the voltage value of the triangular wave and the voltage value represented by the converted voltage signal are compared by the signal comparing circuit, and the corresponding PWM signal is output. In this way, the voltage value represented by the converted voltage signal can be determined from the PWM signal and the voltage amplitude range of the triangular wave, thereby determining the voltage value and/or the current value of the power consuming device. That is, by adopting the technical scheme provided by the disclosure, a special chip for analog-to-digital conversion is not required, but a comparator is used for comparing an analog signal to be detected of the power consumption equipment with a voltage value of a triangular wave to obtain a PWM waveform capable of reflecting the voltage signal, so that the voltage value and/or the current value of the power consumption equipment can be determined according to the PWM waveform, the limitation of a chip communication protocol is avoided, and the signal acquisition efficiency is improved on the basis of reducing the cost.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a schematic diagram of a signal acquisition circuit according to the related art.
Fig. 2 is a schematic diagram of a signal acquisition circuit, according to an example embodiment.
Fig. 3 is a schematic diagram illustrating a comparison of a triangle wave signal with a voltage signal according to an exemplary embodiment.
Fig. 4 is a schematic diagram of another signal acquisition circuit shown according to an exemplary embodiment.
Fig. 5 is a schematic diagram of another signal acquisition circuit shown according to an exemplary embodiment.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
Referring to fig. 1, fig. 1 is a schematic diagram of a signal acquisition circuit according to the related art. As shown in fig. 1, related art generally adopts an ADC dedicated chip to convert analog signals such as voltage or current of an electronic product into digital signals, and then transmits the digital signals to a controller through a communication interface compatible with a chip communication protocol such as I2C or SPI, thereby realizing the acquisition of actual power consumption of the electronic product from the controller. However, using an ADC-specific chip for analog-to-digital conversion increases product cost, and the transmission rate is limited by the chip communication protocol.
In view of this, the embodiment of the disclosure provides a signal acquisition circuit and a chip, which outputs a triangular wave through a triangular wave generation circuit, and a voltage conversion circuit converts an analog signal to be tested of a power consumption device, so as to output a converted voltage signal with a voltage value within a voltage amplitude range of the triangular wave. In this way, the voltage value represented by the converted voltage signal can be determined from the PWM signal and the voltage amplitude range of the triangular wave, thereby determining the voltage value and/or the current value of the power consuming device. That is, the technical solution provided in the embodiments of the present disclosure does not need to set a special chip for analog-to-digital conversion, but may compare an analog signal to be detected of a power consumption device with a voltage value of a triangular wave through a comparator to obtain a PWM waveform capable of reflecting the voltage signal, so that the voltage value and/or the current value of the power consumption device may be determined according to the PWM waveform, which may not be limited by a chip communication protocol, and improve signal acquisition efficiency on the basis of reducing cost.
Schematic diagrams of a signal acquisition circuit 200 according to embodiments of the present disclosure are shown in fig. 2 to 5. As shown in fig. 2, in an exemplary embodiment of the present disclosure, the signal acquisition circuit 200 includes a triangular wave generation circuit 202, a voltage conversion circuit 203, and a signal comparison circuit 204, the signal comparison circuit 204 includes a comparator 2041;
the input end of the voltage conversion circuit 203 is used for being electrically connected with the power consumption equipment, so that the input end of the voltage conversion circuit 203 inputs an analog signal to be tested of the power consumption equipment, and the output end of the voltage conversion circuit 203 is connected with the first input end of the comparator 2041;
an output terminal of the triangular wave generating circuit 202 is connected to a second input terminal of the comparator 2041.
The power consumption device may be an electronic product or a power consumption device in an electronic product. The analog signal to be measured of the power consuming device may be a voltage signal and/or a current signal. The comparator 2041 in the signal comparison circuit 204 is for comparing the triangular wave signal output from the triangular wave generation circuit 202 and the converted voltage signal output from the voltage conversion circuit 203, thereby generating a PWM signal with a duty ratio varying in proportion to the converted voltage signal output from the voltage conversion circuit. The ratio between the duty ratio of the PWM signal and the converted voltage signal output by the voltage conversion circuit may be a forward ratio or a reverse ratio, which is not particularly limited in the present disclosure.
Referring to the example of fig. 3, on the basis of setting the ratio between the duty ratio of the PWM signal and the converted voltage signal output from the voltage conversion circuit to the forward ratio, a high level may be output in the case where the voltage value represented by the triangular wave is smaller than the voltage value output from the voltage conversion circuit 203, and a low level may be output in the case where the voltage value represented by the triangular wave is larger than the voltage value output from the voltage conversion circuit 203, thereby obtaining a PWM signal having a duty ratio in the forward ratio with the voltage signal. On the basis, the voltage value represented by the converted voltage signal can be determined according to the duty ratio of the PWM signal and the voltage amplitude range of the triangular wave.
For example, the voltage value characterized by the converted voltage signal may be determined by the following equation:
V rotation ＝V min +D*(V max -V min )
Wherein V is Rotation For converting the voltage value characterised by the voltage signal, V min Is the lowest voltage value of the triangular wave voltage amplitude range, V max The highest voltage value in the amplitude range of the triangular wave voltage is represented by D, and the duty ratio is represented by D.
Therefore, the value represented by the analog signal to be measured before conversion can be determined according to the voltage value represented by the converted voltage signal, and the value represented by the analog signal to be measured can be the voltage value or the current value of the power consumption equipment.
Optionally, the signal acquisition circuit may further comprise a controller, which may be used to connect the output of the comparator, so that the determination of the voltage value and/or the current value of the power consumption device from the PWM signal output by the comparator is achieved by the controller.
In this embodiment, the triangular wave is output by the triangular wave generating circuit 202, the voltage converting circuit 203 converts the analog signal to be tested of the power consumption device, thereby outputting a converted voltage signal with a voltage value within the range of the voltage amplitude of the triangular wave, on the basis of which the voltage value of the triangular wave and the voltage value represented by the converted voltage signal are compared by the signal comparing circuit 204, and a corresponding PWM signal is output. In this way, the controller may analyze the duty cycle from the PWM signal and determine a voltage value represented by the converted voltage signal from the voltage amplitude range of the triangular wave, thereby determining a voltage value and/or a current value of the power consumption device. That is, by adopting the technical scheme provided by the disclosure, a special chip for analog-to-digital conversion is not required, but the comparator 2041 is used for comparing the analog signal to be detected of the power consumption device with the voltage value of the triangular wave to obtain the PWM waveform capable of reflecting the voltage signal, so that the voltage value and/or the current value of the power consumption device can be determined according to the PWM waveform, and the signal acquisition efficiency can be improved on the basis of reducing the cost without being limited by a chip communication protocol.
It should be noted that the speed at which the controller parses the duty cycle to obtain the voltage value and/or the current value of the power consumption device may depend on the frequency of the triangular wave, and the higher the frequency of the triangular wave, the faster the controller collects the signal. The frequency of the triangular wave is affected by the speed of the comparator 2041, so that comparators with different speeds can be selected according to actual conditions, and the signal acquisition efficiency can be flexibly controlled.
It should be further noted that the signal acquisition circuit 200 may be configured to acquire a voltage signal and/or a current signal of the power consumption device, and the voltage conversion circuit 203 in the signal acquisition circuit 200 is different according to the acquired analog signal to be measured. The voltage signal converted by the voltage conversion circuit 203 may be a voltage signal of the power consumption device or a voltage signal of a sampling resistor for determining a current signal of the power consumption device. According to ohm's law, the current signal of the sampling resistor is inversely proportional to the voltage signal, whereby the current signal of the sampling resistor can be determined from the voltage signal of the sampling resistor, and thus the current signal of the power consuming device.
In one possible implementation, the current signal of the power consuming device may be collected by providing a sampling resistor in series with the power consuming device in the voltage conversion circuit 203. Since the sampling resistor is connected in series with the power consumption device, the current of the sampling resistor coincides with the current of the power consumption device, whereby the current value of the power consumption device can be determined by measuring the current value of the sampling resistor.
It should be noted that the sampling resistor may be a precision resistor, so that a large waste of power consumption caused by the sampling resistor can be avoided. Since the resistance value of the precision resistor is generally small, the voltage signal generated by the current passing through the precision resistor is also small, and thus the voltage of the precision resistor can be amplified by the voltage proportional amplifying circuit. That is, the voltage conversion circuit 203 may include a sampling resistor and a first voltage proportional amplifying circuit.
As shown in fig. 4, in an exemplary embodiment of the present disclosure, the signal acquisition circuit 200 may include a triangle wave generation circuit 202, a voltage conversion circuit 203, and a signal comparison circuit 204, wherein the voltage conversion circuit 203 may include a sampling resistor 2031 and a first voltage proportional amplification circuit 2032;
the sampling resistor 2031 is used for being connected with power consumption equipment in series;
the first voltage proportional amplifying circuit 2032 is configured to amplify the voltage of the sampling resistor 2031 and to transmit the amplified first voltage signal to the first input terminal of the comparator 2041.
It is understood that in the case where the sampling resistor 2031 is connected in series with the power consumption device, the current of the sampling resistor 2031 coincides with the current of the power consumption device. On this basis, the sampling voltage signal corresponding to the sampling resistor may be amplified by the first voltage proportional amplifying circuit 2032, thereby obtaining a converted voltage signal having a voltage value within the triangular wave voltage amplitude range. The sampled voltage signal may represent a voltage value of the sampled resistor before the voltage of the sampled resistor is amplified, and the converted voltage signal (i.e., the first voltage signal) may represent a voltage value of the sampled resistor after the voltage of the sampled resistor is amplified. Thus, after comparing the voltage value of the triangular wave and the voltage value represented by the converted voltage signal by the signal comparison circuit 204 and outputting the corresponding PWM signal, the controller may determine the voltage value represented by the converted voltage signal according to the PWM signal and the voltage amplitude range of the triangular wave. In this way, the controller can determine the voltage value represented by the sampled voltage signal according to the voltage value represented by the converted voltage signal and the amplification ratio of the first voltage scaling circuit 2032, and determine the current value of the power consumption device according to the voltage value represented by the sampled voltage signal and the resistance value of the sampling resistor. The amplification ratio of the first voltage proportional amplifying circuit 2032 may be determined according to the actual situation, which is not particularly limited in the disclosure.
Taking the example of fig. 4, the first voltage scaling circuit 2032 may include a capacitor 20321, an operational amplifier 20322, and a number of resistors. Wherein, the capacitor 20321 may be connected in parallel with the operational amplifier 20322, the capacitor 20321 may be used for filtering, the setting of the capacitor 20321 is not necessary in specific implementation, and whether the capacitor 20321 is set may be selected according to actual requirements. The operational amplifier 20322 and a plurality of resistors are used for amplifying the voltage signal of the sampling resistor 2031, wherein the arrangement manner of each circuit element can refer to the related technology. It should be understood that the placement and connection of the resistors in the operational amplifier may be changed according to actual requirements.
Since the voltage of the power consumption device may be a fixed value or may change continuously with other conditions, for example, the voltage of the notebook may decrease with decreasing electric power. Therefore, in the case of collecting voltage signals of power consumption devices, the voltage conversion circuit in the signal collection circuit 200 is also different for power consumption devices of different voltage types.
In an embodiment, in the case where the voltage of the power consumption device is fixed, a fixed voltage value of the power consumption device may be acquired in advance, whereby the power consumption of the power consumption device may be determined from the current value of the power consumption device determined based on the sampling resistor and the fixed voltage value of the power consumption device acquired in advance.
In another embodiment, in the case where the voltage of the power consumption device is not fixed, since the voltage ranges of the voltage variations of different power consumption devices are different, in the case where the voltage of the power consumption device varies in a high voltage range, a voltage dividing resistor connected in series with the power consumption device may be provided in the voltage conversion circuit 203, so that the magnitude of the voltage value output by the voltage conversion circuit 203 is reduced by the voltage division, so that the voltage value output by the voltage conversion circuit 203 is within the voltage amplitude range of the triangular wave. In the case where the voltage of the power consumption device fluctuates in a low voltage range, the voltage of the power consumption device can be amplified by the voltage proportional amplifying circuit so that the voltage value output by the voltage converting circuit 203 is within the voltage amplitude range of the triangular wave. It is to be understood that, when the voltage of the power consumption device varies within the voltage amplitude range of the triangular wave, the voltage signal of the power consumption device does not need to be converted by the voltage conversion circuit 203, but the voltage signal of the power consumption device may be directly input to the first input terminal of the comparator 2041. The specific values of the high voltage range and the low voltage range may be determined according to practical situations, which is not specifically limited in the disclosure.
In this way, when determining the voltage value of the power consumption device, the power consumption of the power consumption device can be determined from the current value of the power consumption device determined based on the sampling resistor and the voltage value.
As shown in fig. 5, in an exemplary embodiment of the present disclosure, in a case where the voltage of the power consumption device varies within a high voltage range, the signal acquisition circuit 200 may include a triangle wave generation circuit 202, a voltage conversion circuit 203, and a signal comparison circuit 204, wherein the voltage conversion circuit 203 in the signal acquisition circuit 200 may include a voltage division resistor 2033 and a ground resistor 2034;
the first terminal of the voltage dividing resistor 2033 is connected to the ground resistor 2034 and the first input terminal of the comparator 2041, respectively, and the second terminal of the voltage dividing resistor 2033 is used for being connected in series with the power consumption device.
It is to be understood that the voltage dividing resistor 2033 is connected in series with the power consumption device, whereby voltage division can be performed by the voltage dividing resistor 2033 so that the voltage value output by the voltage conversion circuit is within the triangular wave voltage amplitude range. On this basis, the voltage value represented by the converted voltage signal determined by the controller according to the PWM signal and the voltage amplitude range of the triangular wave is the voltage value divided by the voltage dividing resistor 2033, so that the voltage value of the power consumption device can be determined according to the voltage value represented by the converted voltage signal and the voltage value corresponding to the voltage dividing resistor. The voltage value of the voltage dividing resistor 2033 is related to the voltage fluctuation range of the power consumption device and the voltage amplitude range of the triangular wave. In some embodiments, the voltage value of the voltage dividing resistor 2033 required may be determined based on the maximum value of the power consumption device voltage variation range and the maximum value of the triangular wave voltage amplitude range.
It is understood that the voltage conversion circuit 203 may include a second voltage proportional amplifying circuit in the case where the voltage of the power consuming device fluctuates in a low voltage range.
The second voltage proportional amplifying circuit may be configured to amplify a voltage of the power consumption device and transmit the amplified second voltage signal to the first input terminal of the comparator 2041.
Thus, the voltage signal to be measured of the power consumption device can be amplified by the voltage conversion circuit 203 to obtain a converted voltage signal (i.e., the second voltage signal) having a voltage value within the range of the triangular wave voltage amplitude. The converted voltage signal may represent a voltage value of the power consumption device after the voltage is amplified. On the basis, the controller can determine the voltage value represented by the voltage signal to be measured, namely, the voltage value of the power consumption equipment according to the voltage value represented by the converted voltage signal and the amplification ratio of the second voltage proportional amplifying circuit after determining the voltage value represented by the converted voltage signal according to the PWM signal and the voltage amplitude range of the triangular wave. The amplification ratio of the second voltage proportional amplifying circuit may be determined according to practical situations, which is not particularly limited in the present disclosure.
In addition, the second voltage proportional amplifying circuit is similar to the first voltage proportional amplifying circuit 2032 in structure, and will not be described here again.
It should be noted that the circuit elements provided for different situations of the power consumption device may be connected in the same circuit by the gate switch. The arrangement of the gate switch may refer to the related art, which is not particularly limited in the present disclosure. The gate switch may be provided, for example, in a manner as shown in fig. 1, so that the circuit elements provided in the above-described different cases are connected in the same circuit. In this way, the voltage value or the current value of the power consumption device can be selectively collected by the gating switch. Further, the actual power consumption of the power consuming device may be determined on the basis of determining the voltage value and the current value of the power consuming device.
Alternatively, the triangular wave generation circuit 202 may include a resistor and a capacitor;
the first end of the resistor is used for being connected with the controller, and the second end of the resistor is respectively connected with the first end of the capacitor and the second input end of the comparator;
the second end of the capacitor is grounded.
The connection method of the circuit elements can be referred to as a triangle wave generation circuit 202 shown in fig. 4 and 5. The controller connected with the first end of the resistor can be a controller in the signal acquisition circuit or an external controller.
In one possible implementation, a controller inside the signal acquisition circuit may be connected to the input of the triangular wave generation circuit, so that 50% of the standard square wave is generated by the controller, and on this basis, the standard square wave is filtered by an RC filter circuit formed by a resistor and a capacitor, so as to generate the triangular wave. In this process, the slope and amplitude of the triangular wave waveform can be adjusted by adjusting the resistance value of the resistor and/or the capacitance value of the capacitor. The voltage amplitude range of the triangular wave may be determined according to practical situations, which is not specifically limited in the present disclosure. The first end of the resistor may be connected to an external controller and a standard square wave is generated by the external controller.
It should be appreciated that the triangle wave generation circuit 202 has low cost, and the triangle wave output by the triangle wave generation circuit 202 can effectively control the cost of the signal acquisition circuit. In one possible implementation, other circuit arrangements may also be used to output the triangular wave, which is not specifically limited in this disclosure.
Through the above technical scheme, the triangular wave generating circuit 202 is utilized to output triangular waves, the voltage converting circuit 203 converts analog signals to be tested of the power consumption equipment, so as to output converted voltage signals with voltage values within the range of the voltage amplitude of the triangular waves, on the basis, the signal comparing circuit 204 is utilized to compare the voltage values of the triangular waves and the voltage values represented by the converted voltage signals, and corresponding PWM signals are output. In this way, the controller can determine the voltage value characterized by the converted voltage signal, and thus the voltage value and/or the current value of the power consumption device, based on the PWM signal and the voltage amplitude range of the triangular wave. That is, by adopting the technical scheme provided by the disclosure, a special chip for analog-to-digital conversion is not required, but the comparator 2041 is used for comparing the analog signal to be detected of the power consumption device with the voltage value of the triangular wave to obtain the PWM waveform capable of reflecting the voltage signal, so that the voltage value and/or the current value of the power consumption device can be determined according to the PWM waveform, and the signal acquisition efficiency can be improved on the basis of reducing the cost without being limited by a chip communication protocol.
Based on the same conception, the disclosure also provides a chip integrated with the signal acquisition circuit.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. The signal acquisition circuit is characterized by comprising a triangular wave generation circuit, a voltage conversion circuit and a signal comparison circuit, wherein the signal comparison circuit comprises a comparator;
the input end of the voltage conversion circuit is used for being electrically connected with power consumption equipment, so that the input end of the voltage conversion circuit inputs an analog signal to be tested of the power consumption equipment, and the output end of the voltage conversion circuit is connected with the first input end of the comparator;
the output end of the triangular wave generating circuit is connected with the second input end of the comparator.
2. The signal acquisition circuit of claim 1, wherein the voltage conversion circuit comprises a sampling resistor and a first voltage scaling circuit;
the sampling resistor is used for being connected with the power consumption equipment in series;
the first voltage proportional amplifying circuit is used for amplifying the voltage of the sampling resistor and transmitting the amplified first voltage signal to the first input end of the comparator.
3. The signal acquisition circuit of claim 1, wherein the voltage conversion circuit comprises a second voltage scaling circuit;
the second voltage proportional amplifying circuit is used for amplifying the voltage of the power consumption equipment and transmitting the amplified second voltage signal to the first input end of the comparator.
4. The signal acquisition circuit of claim 1, wherein the voltage conversion circuit comprises a voltage dividing resistor and a ground resistor;
the first end of the voltage dividing resistor is connected with the grounding resistor and the first input end of the comparator respectively, and the second end of the voltage dividing resistor is connected with the power consumption equipment in series.
5. The signal acquisition circuit of any one of claims 1-4, wherein the triangular wave generation circuit comprises a resistor and a capacitor;
the first end of the resistor is used for being connected with the controller, and the second end of the resistor is respectively connected with the first end of the capacitor and the second input end of the comparator;
the second end of the capacitor is grounded.
6. The signal acquisition circuit of any one of claims 1-4, wherein the signal acquisition circuit further comprises a controller;
the controller is connected with the output end of the comparator.
7. The signal acquisition circuit of claim 6 wherein the controller is further coupled to an input of the triangular wave generation circuit.
8. The signal acquisition circuit of claim 2, wherein the sampling resistor is a precision resistor.
9. The signal acquisition circuit of claim 2, wherein the first voltage scaling circuit comprises a capacitor and an operational amplifier;
the capacitor is connected in parallel with the operational amplifier.
10. A chip, characterized in that it is integrated with a signal acquisition circuit according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320539448.5U CN219611764U (en) | 2023-03-14 | 2023-03-14 | Signal acquisition circuit and chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320539448.5U CN219611764U (en) | 2023-03-14 | 2023-03-14 | Signal acquisition circuit and chip |
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