CN214539779U - Voltage variation trigger circuit - Google Patents
Voltage variation trigger circuit Download PDFInfo
- Publication number
- CN214539779U CN214539779U CN202120296229.XU CN202120296229U CN214539779U CN 214539779 U CN214539779 U CN 214539779U CN 202120296229 U CN202120296229 U CN 202120296229U CN 214539779 U CN214539779 U CN 214539779U
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistor
- comparator
- electrically connected
- voltage division
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The application relates to a voltage change trigger circuit, include: the device comprises a first voltage division module and a first comparator; the input end of the first voltage division module is suitable for being electrically connected with an input voltage end, the first output end of the first voltage division module is electrically connected with the positive input end of the first comparator, and the second output end of the first voltage division module is electrically connected with the negative input end of the first comparator, so that the first voltage division module divides a voltage signal of the input voltage end to obtain a first voltage signal and a second voltage signal and respectively inputs the first voltage signal and the second voltage signal to the first comparator; the output end of the first comparator is suitable for being electrically connected with the control equipment, so that the first comparator outputs corresponding trigger signals according to the change of the first voltage signal and the second voltage signal. The method and the device realize that the response processing of the rear-stage control equipment is prompted when the output of the sensor changes, so that the condition that the rear-stage control equipment continuously samples voltage signals to cause resource and power waste is effectively avoided.
Description
Technical Field
The application relates to the technical field of electromechanical control, in particular to a voltage change trigger circuit.
Background
At present, a plurality of electromechanical products need to carry out analog quantity closed-loop control, and most of analog quantity can be converted into voltage quantity to be collected and output. With the light weight and low power consumption design of control systems and control devices, the utilization efficiency of analog-digital acquisition and control circuits is becoming an important point. Most analog quantity control circuits requiring analog-to-digital conversion basically adopt an analog-to-digital acquisition circuit to continuously acquire analog quantity and control back-end equipment. In the related art, the sampling period is usually controlled by using a timing acquisition or a polling acquisition, or the analog-to-digital acquisition is triggered by comparing with a fixed threshold.
However, in the actual analog voltage control circuit, the analog voltage is not changed frequently in most cases, and the analog voltage is changed only when the external condition is changed and the operation is considered, and in the control circuit for collecting the voltage value change by adopting the current timing or polling collection method, the control system needs to spend much system resources and time to collect useless analog quantity, which causes the waste of control system resources and increases the power consumption.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a voltage change trigger circuit, which can effectively save control system resources and reduce power consumption.
According to an aspect of the present application, there is provided a voltage change trigger circuit including: the device comprises a first voltage division module and a first comparator;
the input end of the first voltage division module is suitable for being electrically connected with an input voltage end, the first output end of the first voltage division module is electrically connected with the positive input end of the first comparator, and the second output end of the first voltage division module is electrically connected with the negative input end of the first comparator, so that the first voltage division module divides a voltage signal of the input voltage end to obtain a first voltage signal and a second voltage signal and respectively inputs the first voltage signal and the second voltage signal to the first comparator;
the output end of the first comparator is suitable for being electrically connected with a control device, so that the first comparator outputs corresponding trigger signals according to the change of the first voltage signal and the second voltage signal.
In a possible implementation manner, the voltage divider further comprises a second voltage dividing module and a second comparator;
the input end of the second voltage division module is suitable for being electrically connected with the input voltage end, the first output end of the second voltage division module is electrically connected with the positive input end of the second comparator, and the second output end of the second voltage division module is electrically connected with the negative input end of the second comparator, so that the second voltage division module divides the voltage signal of the input voltage end to obtain a third voltage signal and a fourth voltage signal and respectively inputs the third voltage signal and the fourth voltage signal to the second comparator;
the output end of the second comparator is suitable for being electrically connected with the control equipment, so that the second comparator outputs corresponding trigger signals according to the change of the third voltage signal and the fourth voltage signal;
wherein the trigger signal output by the first comparator is opposite to the trigger signal output by the second comparator.
In one possible implementation, the first voltage dividing module comprises a first voltage dividing network and a first voltage dividing filter network;
the input end of the first voltage division network and the input end of the first voltage division filter network are both used as the input end of the first voltage division module and are suitable for being electrically connected with the input voltage end;
the output end of the first voltage division network is used as the first output end of the first voltage division module and is electrically connected with the positive input end of the first comparator;
and the output end of the first voltage division filter network is used as a second output end of the first voltage division module and is electrically connected with the negative input end of the first comparator.
In one possible implementation, the first voltage division network includes a first resistor and a second resistor connected in series;
one end of the first resistor, which is not electrically connected with the second resistor, is used as an input end of the first voltage division network and is suitable for being electrically connected with the input voltage end;
the connecting end of the first resistor and the second resistor is used as the output end of the first voltage division network and is electrically connected with the positive input end of the first comparator;
and one end of the second resistor, which is not connected with the first resistor, is grounded.
In one possible implementation manner, the resistance value of the first resistor is 100K Ω, and the resistance value of the second resistor is 800K Ω.
In one possible implementation, the first filter-division filter network includes a third resistor, a fourth resistor, and a first capacitor;
the first resistor is connected with the fourth resistor in series, and the first capacitor is connected with the fourth resistor in parallel;
the end of the first resistor, which is not connected with the fourth resistor, is used as the input end of the first voltage division filter network and is suitable for being electrically connected with the input voltage end;
the connection end of the third resistor and the fourth resistor is used as the output end of the first voltage division and filter network and is electrically connected with the negative input end of the first comparator;
and one end of the fourth resistor, which is not connected with the third resistor, is grounded.
In one possible implementation manner, the third resistor has a resistance of 100K Ω, the fourth resistor has a resistance of 1000K Ω, and the first capacitor has a capacitance of 1 μ F.
In one possible implementation, the second voltage divider module includes a second voltage divider network and a second voltage divider filter network;
the input end of the second voltage division network and the input end of the second voltage division filter network are both used as the input end of the second voltage division module and are suitable for being electrically connected with the input voltage end;
the output end of the second voltage division filter network is used as the first output end of the second voltage division module and is electrically connected with the positive input end of the second comparator;
and the output end of the second voltage division network is used as a second output end of the second voltage division module and is electrically connected with the negative input end of the second comparator.
In one possible implementation, the second filter-division filter network includes a fifth resistor, a sixth resistor, and a second capacitor;
the fifth resistor is connected with the sixth resistor in series, and the second capacitor is connected to two ends of the sixth resistor in parallel;
the end, which is not connected with the sixth resistor, of the fifth resistor is used as the input end of the second filter voltage division filter network and is suitable for being electrically connected with the input voltage end;
the connection end of the fifth resistor and the sixth resistor is used as the output end of the second voltage division filter network and is electrically connected with the positive input end of the first comparator;
and one end of the sixth resistor, which is not connected with the fifth resistor, is grounded.
In one possible implementation, the second voltage-dividing network includes a seventh resistor and an eighth resistor;
the seventh resistor is connected in series with the eighth resistor;
one end of the seventh resistor, which is not connected with the eighth resistor, is used as an input end of the second filter voltage division filter network and is suitable for being electrically connected with the input voltage end;
one end of the seventh resistor, which is connected with the eighth resistor, is used as the output end of the second filter voltage division filter network and is electrically connected with the negative input end of the second comparator;
and one end of the eighth resistor, which is not connected with the seventh resistor, is grounded.
The voltage signal acquired by the sensor is subjected to voltage division processing by arranging the first voltage division module, and then the first voltage signal and the second voltage signal obtained by voltage division processing of the first voltage division module are compared by the first comparator to obtain the change of the voltage signal acquired by the sensor, so that a corresponding trigger signal is output according to the change of the voltage signal. Compared with a control circuit which adopts the current timing or polling acquisition mode to acquire the voltage value change in the related technology, the voltage change trigger circuit of the embodiment of the application is added, so that the situation that the CPU or the control equipment at the rear stage is prompted to respond and process by the trigger signal when the output of the sensor changes is realized, the situation that the CPU and the control equipment at the rear stage continuously poll and sample the voltage signal output by the sensor for a long time to cause performance resource and power waste is effectively avoided, the resource is effectively saved, and the power consumption is reduced.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
FIG. 1 shows a circuit diagram of a voltage change trigger circuit according to an embodiment of the present application;
FIG. 2 is a waveform diagram illustrating a voltage increase detected when a voltage change trigger circuit according to an embodiment of the present application is employed;
fig. 3 is a diagram showing a voltage drop waveform detected when the voltage change trigger circuit according to an embodiment of the present application is used.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
Fig. 1 shows a circuit diagram of a voltage variation trigger circuit according to an embodiment of the present application. As shown in fig. 1, the voltage change trigger circuit includes: a first voltage divider module 110 and a first comparator U1. The input end of the first voltage divider module 110 is adapted to be electrically connected to an input voltage end, and the first output end of the first voltage divider module 110 is electrically connected to the positive input end of the first comparator U1. The second output terminal of the first voltage divider module 110 is electrically connected to the negative input terminal of the first comparator U1. By electrically connecting the first voltage dividing module 110 between the input voltage terminal and the first comparator U1, the first voltage dividing module 110 divides the voltage signal of the input voltage terminal to obtain a first voltage signal and a second voltage signal, and then inputs the first voltage signal and the second voltage signal obtained by the voltage dividing process to the first comparator U1, respectively. The output end of the first comparator U1 is electrically connected to the control device, so that the first comparator U1 outputs a corresponding trigger signal according to the change of the first voltage signal and the second voltage signal to trigger the control device.
Therefore, the voltage change trigger signal of the embodiment of the application performs voltage division processing on the voltage signal acquired by the sensor by setting the first voltage division module 110, and then compares the first voltage signal and the second voltage signal obtained by voltage division processing of the first voltage division module 110 by the first comparator U1 to obtain the change of the voltage signal acquired by the sensor, so as to output a corresponding trigger signal according to the change of the voltage signal. Compared with a control circuit which adopts the current timing or polling acquisition mode to acquire the voltage value change in the related technology, the voltage change trigger circuit of the embodiment of the application is added, so that the situation that the CPU or the control equipment at the rear stage is prompted to respond and process by the trigger signal when the output of the sensor changes is realized, the situation that the CPU and the control equipment at the rear stage continuously poll and sample the voltage signal output by the sensor for a long time to cause performance resource and power waste is effectively avoided, the resource is effectively saved, and the power consumption is reduced.
Therein, in one possible implementation, the first voltage dividing module 110 includes a first voltage dividing network 111 and a first voltage dividing filter network 112. Specifically, the input end of the first voltage division network 111 and the input end of the first voltage division filter network 112 are both used as the input end of the first voltage division module 110, and are adapted to be electrically connected to an input voltage end. An output terminal of the first voltage division network 111 serves as a first output terminal of the first voltage division module 110, and is electrically connected to a positive input terminal of the first comparator U1. An output end of the first voltage division filter network 112 serves as a second output end of the first voltage division module 110, and is electrically connected to a negative input end of the first comparator U1.
More specifically, the first voltage-dividing network 111 includes a first resistor R1 and a second resistor R2 connected in series. The end of the first resistor R1 not electrically connected to the second resistor R2 is used as the input end of the first voltage-dividing network 111, and is adapted to be electrically connected to an input voltage end. The connection end of the first resistor R1 and the second resistor R2 is electrically connected to the positive input end of the first comparator U1 as the output end of the first voltage divider network 111. The end of the second resistor R2 not connected to the first resistor R1 is grounded. In one possible implementation, the first resistor R1 has a resistance of 100K Ω, and the second resistor R2 has a resistance of 800K Ω.
Further, referring to fig. 1, the first filter-voltage network 112 includes a third resistor R3, a fourth resistor R4, and a first capacitor C1. The first resistor R1 is connected in series with the fourth resistor R4, and the first capacitor C1 is connected in parallel with the fourth resistor R4. One end of the first resistor R1, which is not connected to the fourth resistor R4, serves as an input end of the first filter-filter network 112, and is adapted to be electrically connected to an input voltage end. The connection end of the third resistor R3 and the fourth resistor R4 serves as the output end of the first filter-filter network 112, and is electrically connected to the negative input end of the first comparator U1. The end of the fourth resistor R4 not connected to the third resistor R3 is grounded.
In one possible implementation manner, the resistance of the third resistor R3 may be 100K Ω, the resistance of the fourth resistor R4 may be 1000K Ω, and the capacitance of the first capacitor C1 may be 1 μ F.
Thus, the first voltage division module 110 is implemented in the above manner, so that the first comparator U1 can generate a trigger signal again when the voltage at the input voltage terminal rises, thereby triggering the subsequent control device to respond. Specifically, with the above-described embodiment of the first voltage division module 110, the specific process of generating the trigger signal by increasing the voltage is as follows:
VIN at the input voltage terminal generates a V1 signal (i.e., a first voltage signal) through a first voltage divider network 111 composed of a first resistor R1 and a second resistor R2, and is connected to the positive input terminal of the first comparator U1. VIN generates a V2 signal (i.e., a second voltage signal) through the first filter-divider network 112 composed of the third resistor R3, the fourth resistor R4 and the first capacitor C1, and is connected to the negative input terminal of the first comparator U1.
When the VIN signal is a stable dc signal, the voltage at the negative input terminal V2 of the first comparator U1 is slightly higher than the voltage at the positive input terminal V1 due to the difference between the voltage division ratios of V1 and V2, so that the first comparator U1 outputs a low level signal.
Once the input signal of VIN starts to rise, V1 and V2 will rise simultaneously, but the voltage rise of V2 becomes very slow due to the capacitive filtering effect of V2, and if the voltage rise value of VIN is larger than the previous values of V2-V1 in a short time, the voltage of V1 will instantaneously exceed the voltage at V2, so that the first comparator U1 instantaneously outputs a high level, thereby achieving the effect that the voltage rise U1 generates a high level trigger signal.
As can be seen from fig. 2, the waveform changes, the voltage at point T0 is VIN stable input voltage, then the VIN voltage starts to rise, the V1 voltage rise speed is greater than the V2 voltage rise speed, the V1 voltage is greater than the V2 voltage at point T1, then the first comparator U1U 1 outputs a high level VO1, then the VIN voltage is stable again, the V2 voltage is again higher than the V1 voltage at point T2, and then the first comparator U1 outputs VO1 to return to a low level again.
Furthermore, in the voltage variation trigger circuit of the embodiment of the present application, a second voltage dividing module 120 and a second comparator U2 are further included. The input end of the second voltage division module 120 is adapted to be electrically connected to an input voltage end, the first output end of the second voltage division module 120 is electrically connected to the positive input end of the second comparator U2, and the second output end of the second voltage division module 120 is electrically connected to the negative input end of the second comparator U2, so that the second voltage division module 120 divides a voltage signal of the input voltage end to obtain a third voltage signal and a fourth voltage signal, and inputs the third voltage signal and the fourth voltage signal to the second comparator U2, respectively. The output end of the second comparator U2 is electrically connected with the control device, so that the second comparator U2 outputs corresponding trigger signals according to the change of the third voltage signal and the fourth voltage signal. The trigger signal output by the first comparator U1 is opposite to the trigger signal output by the second comparator U2.
Here, it should be noted that the principle of generating the trigger signals of the second voltage division module 120 and the second comparator U2 is the same as or similar to that of generating the trigger signals of the first voltage division module 110 and the first comparator U1, except for the generation condition of the trigger signals.
That is, the voltage variation upon which the first comparator U1 outputs the trigger signal is opposite to the voltage variation upon which the second comparator U2 outputs the trigger signal. Such as: in one possible implementation, the trigger signal of the first comparator U1 is generated when the voltage increases, and the trigger signal of the second comparator U2 is generated when the voltage decreases.
Correspondingly, referring to fig. 1, the second voltage divider module 120 includes a second voltage divider network 122 and a second voltage divider filter network 121. The input end of the second voltage dividing network 122 and the input end of the second voltage dividing filter network 121 are both used as the input end of the second voltage dividing module 120, and are suitable for being electrically connected with the input voltage end. An output end of the second voltage division filter network 121 serves as a first output end of the second voltage division module 120 and is electrically connected with a positive input end of the second comparator U2. An output end of the second voltage dividing network 122 is used as a second output end of the second voltage dividing module 120, and is electrically connected to a negative input end of the second comparator U2.
Specifically, the second filter-splitting network 121 includes a fifth resistor R5, a sixth resistor R6, and a second capacitor C2. The fifth resistor R5 is connected in series with the sixth resistor R6, and the second capacitor C2 is connected in parallel across the sixth resistor R6. The end of the fifth resistor R5, which is not connected to the sixth resistor R6, serves as the input end of the second filter-voltage divider network 121, and is adapted to be electrically connected to the input voltage end. The connection end of the fifth resistor R5 and the sixth resistor R6 serves as the output end of the second filter-voltage division network 121 and is electrically connected to the positive input end of the first comparator U1. The end of the sixth resistor R6 not connected with the fifth resistor R5 is grounded. In one possible implementation manner, the resistance of the fifth resistor R5 may be 100K Ω of the third resistor R3, 800K Ω of the sixth resistor R6, and 1 μ F of the second capacitor C2.
Further, the second voltage divider network 122 includes a seventh resistor R7 and an eighth resistor R8. A seventh resistor R7 is connected in series with the eighth resistor R8. One end of the seventh resistor R7, which is not connected to the eighth resistor R8, serves as an input end of the second filter-division filter network 121, and is adapted to be electrically connected to the input voltage end. One end of the seventh resistor R7, which is connected to the eighth resistor R8, is used as the output end of the second filter-voltage-dividing filter network 121, and is electrically connected to the negative input end of the second comparator U2. The end of the eighth resistor R8 not connected with the seventh resistor R7 is grounded. In one possible implementation, the seventh resistor R7 may have a resistance of 100K Ω, and the eighth resistor R8 may have a resistance of 1000K Ω.
The second voltage division module 120 is implemented in the above manner, so that the second comparator U2 can generate a trigger signal again when the voltage at the input voltage terminal decreases, thereby triggering the subsequent control device to respond. Specifically, with the above embodiment of the second voltage division module 120, the specific process of generating the trigger signal by voltage reduction is as follows:
the input voltage terminal VIN generates a V3 signal (i.e., a third voltage signal) through a second voltage-dividing filter network 121 composed of a fifth resistor R5, a sixth resistor R6 and a second capacitor C2C2, and is connected to the positive input terminal of the second comparator U2. VIN is coupled to the negative input of the second comparator U2 via a second voltage divider network 122 formed by a seventh resistor R7 and an eighth resistor R8 to generate a V4 signal (i.e., a fourth voltage signal).
When the VIN signal is a stable dc signal, the voltage at the negative input terminal V4 of the second comparator U2 is slightly higher than the voltage at the positive input terminal V3 due to the difference between the voltage dividing ratios of V3 and V4, so that the second comparator U2 outputs a low level signal.
Once the VIN input signal starts to decrease, V3 and V4 will rise simultaneously, but the voltage of V3 will decrease very slowly due to the capacitive filtering effect of V3, and if the voltage of VIN decreases more than the previous value of V4-V3 in a short time, the voltage of V3 will instantaneously exceed the voltage of V4, so that the second comparator U2 instantaneously outputs a high level, thereby achieving the effect that the voltage decrease U2 generates a high level trigger signal.
From fig. 3, it can be seen that the waveform changes, the voltage at point T0 is VIN stable input voltage, then the voltage VIN starts to decrease, the voltage decrease speed of V3 is slower than that of V4, the voltage of V3 is greater than that of V4 at point T1, so that the second comparator U2 outputs VO2 at high level, then the voltage of VIN is stable again, the voltage of V4 is again higher than that of V3 at point T2, and then the second comparator U2 outputs VO2 again at low level.
Meanwhile, it is also noted that, in the process of generating the trigger signal by the voltage increase achieved by the first voltage division module 110 and the first comparator U1, the fourth voltage signal (i.e., V4) output to the second voltage division module 120 is always greater than the third voltage signal (i.e., V3), so the second comparator U2 always outputs a low level during the voltage (i.e., VIN) at the input voltage terminal is increased.
Similarly, during the process of generating the trigger signal by the second voltage dividing module 120 and the second comparator U2 realizing the voltage reduction, the second voltage signal (i.e., V2) output to the first voltage dividing module 110 is always greater than the first voltage signal (i.e., V1), so the first comparator U1 always outputs a low level during the process of reducing the voltage (i.e., VIN) at the input voltage terminal.
Therefore, by arranging the voltage change trigger circuit of the embodiment of the application at the front end of the control device, the change of the VIN input causes the change of the trigger signal output, the VIN input voltage rises, and the first comparator U1 outputs a high-level trigger signal; the VIN input voltage is reduced, the second comparator U2 outputs a high-level trigger signal, and the output signals of the first comparator U1 and the second comparator U2 are connected to a CPU at the later stage for control and analog acquisition, so that the variation trend of the input voltage can be rapidly and effectively distinguished, and the performance expense of the CPU is saved.
It should be noted that, the selection of the sizes of the resistors and the capacitors in the first voltage division module 110 and the second voltage division module 120 can be flexibly selected according to actual situations. The resistor voltage division ratio can be used for adjusting the trigger sensitivity of the circuit, and the capacitance value can be used for adjusting the response speed and duration of the trigger signal. Therefore, different requirements for trigger sensitivity and trigger response speed and duration may be selected with different resistors and capacitors, and are not limited in detail here.
It should be noted that although fig. 1 is taken as an example to describe the voltage change trigger circuit, those skilled in the art can understand that the present application should not be limited thereto. In fact, the user can flexibly set the specific circuit implementation manner of each module according to personal preference and/or practical application scenarios, as long as the function of generating the corresponding trigger signal according to the change of the voltage signal can be realized.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A voltage change trigger circuit, comprising: the device comprises a first voltage division module and a first comparator;
the input end of the first voltage division module is suitable for being electrically connected with an input voltage end, the first output end of the first voltage division module is electrically connected with the positive input end of the first comparator, and the second output end of the first voltage division module is electrically connected with the negative input end of the first comparator, so that the first voltage division module divides a voltage signal of the input voltage end to obtain a first voltage signal and a second voltage signal and respectively inputs the first voltage signal and the second voltage signal to the first comparator;
the output end of the first comparator is suitable for being electrically connected with a control device, so that the first comparator outputs corresponding trigger signals according to the change of the first voltage signal and the second voltage signal.
2. The voltage change trigger circuit of claim 1, further comprising a second voltage divider module and a second comparator;
the input end of the second voltage division module is suitable for being electrically connected with the input voltage end, the first output end of the second voltage division module is electrically connected with the positive input end of the second comparator, and the second output end of the second voltage division module is electrically connected with the negative input end of the second comparator, so that the second voltage division module divides the voltage signal of the input voltage end to obtain a third voltage signal and a fourth voltage signal and respectively inputs the third voltage signal and the fourth voltage signal to the second comparator;
the output end of the second comparator is suitable for being electrically connected with the control equipment, so that the second comparator outputs corresponding trigger signals according to the change of the third voltage signal and the fourth voltage signal;
wherein the trigger signal output by the first comparator is opposite to the trigger signal output by the second comparator.
3. The voltage change trigger circuit of claim 1, wherein the first voltage divider module comprises a first voltage divider network and a first voltage divider filter network;
the input end of the first voltage division network and the input end of the first voltage division filter network are both used as the input end of the first voltage division module and are suitable for being electrically connected with the input voltage end;
the output end of the first voltage division network is used as the first output end of the first voltage division module and is electrically connected with the positive input end of the first comparator;
and the output end of the first voltage division filter network is used as a second output end of the first voltage division module and is electrically connected with the negative input end of the first comparator.
4. A voltage change trigger circuit according to claim 3, wherein the first voltage dividing network comprises a first resistor and a second resistor connected in series;
one end of the first resistor, which is not electrically connected with the second resistor, is used as an input end of the first voltage division network and is suitable for being electrically connected with the input voltage end;
the connecting end of the first resistor and the second resistor is used as the output end of the first voltage division network and is electrically connected with the positive input end of the first comparator;
and one end of the second resistor, which is not connected with the first resistor, is grounded.
5. The voltage change trigger circuit according to claim 4, wherein the first resistor has a resistance of 100K Ω and the second resistor has a resistance of 800K Ω.
6. A voltage variation triggering circuit as recited in claim 3 wherein said first voltage-splitting filter network comprises a third resistor, a fourth resistor and a first capacitor;
the first resistor is connected with the fourth resistor in series, and the first capacitor is connected with the fourth resistor in parallel;
the end of the first resistor, which is not connected with the fourth resistor, is used as the input end of the first voltage division filter network and is suitable for being electrically connected with the input voltage end;
the connection end of the third resistor and the fourth resistor is used as the output end of the first voltage division and filter network and is electrically connected with the negative input end of the first comparator;
and one end of the fourth resistor, which is not connected with the third resistor, is grounded.
7. The voltage change trigger circuit according to claim 6, wherein the third resistor has a resistance of 100K Ω, the fourth resistor has a resistance of 1000K Ω, and the first capacitor has a capacitance of 1 μ F.
8. The voltage change trigger circuit of claim 2, wherein the second voltage divider module comprises a second voltage divider network and a second voltage divider filter network;
the input end of the second voltage division network and the input end of the second voltage division filter network are both used as the input end of the second voltage division module and are suitable for being electrically connected with the input voltage end;
the output end of the second voltage division filter network is used as the first output end of the second voltage division module and is electrically connected with the positive input end of the second comparator;
and the output end of the second voltage division network is used as a second output end of the second voltage division module and is electrically connected with the negative input end of the second comparator.
9. The voltage change trigger circuit of claim 8, wherein the second voltage divider filter network comprises a fifth resistor, a sixth resistor, and a second capacitor;
the fifth resistor is connected with the sixth resistor in series, and the second capacitor is connected to two ends of the sixth resistor in parallel;
the end, which is not connected with the sixth resistor, of the fifth resistor is used as the input end of the second filter voltage division filter network and is suitable for being electrically connected with the input voltage end;
the connection end of the fifth resistor and the sixth resistor is used as the output end of the second voltage division filter network and is electrically connected with the positive input end of the first comparator;
and one end of the sixth resistor, which is not connected with the fifth resistor, is grounded.
10. The voltage change trigger circuit of claim 8, wherein the second voltage dividing network comprises a seventh resistor and an eighth resistor;
the seventh resistor is connected in series with the eighth resistor;
one end of the seventh resistor, which is not connected with the eighth resistor, is used as an input end of the second filter voltage division filter network and is suitable for being electrically connected with the input voltage end;
one end of the seventh resistor, which is connected with the eighth resistor, is used as the output end of the second filter voltage division filter network and is electrically connected with the negative input end of the second comparator;
and one end of the eighth resistor, which is not connected with the seventh resistor, is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120296229.XU CN214539779U (en) | 2021-02-02 | 2021-02-02 | Voltage variation trigger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120296229.XU CN214539779U (en) | 2021-02-02 | 2021-02-02 | Voltage variation trigger circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214539779U true CN214539779U (en) | 2021-10-29 |
Family
ID=78233487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120296229.XU Active CN214539779U (en) | 2021-02-02 | 2021-02-02 | Voltage variation trigger circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214539779U (en) |
-
2021
- 2021-02-02 CN CN202120296229.XU patent/CN214539779U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109313518B (en) | Piezoelectric sensor element detection | |
| US11609664B2 (en) | Capacitance detection circuit, sensor, chip and electronic device | |
| WO2014201198A1 (en) | Capacitive proximity detection using delta-sigma conversion | |
| CN110022155B (en) | Asynchronous over-level sampling analog-to-digital converter with sampling threshold changing along with input signal | |
| WO2003084072A2 (en) | Analog-to-digital conversion | |
| CN112865548B (en) | Switching power supply and feedback voltage sampling control circuit thereof | |
| CN114336813B (en) | Charging control circuit, charging chip and charging equipment | |
| CN101685364A (en) | Device and method for sensing touch panel | |
| CN214539779U (en) | Voltage variation trigger circuit | |
| CN106033964B (en) | Button triggers detection device and has its domestic appliance among domestic appliance | |
| CN108241129B (en) | Device and method for monitoring output filter capacitor of switching power supply | |
| CN109921794B (en) | Asynchronous over-level sampling analog-to-digital converter with variable hysteresis | |
| CN113009854B (en) | Device for obtaining effective value of analog input signal | |
| CN218958903U (en) | Analog-to-digital converter | |
| CN114337634A (en) | Capacitive touch key detection circuit and detection method thereof | |
| CN112254726A (en) | Current conversion circuit, inertial navigation device, control method, and storage medium | |
| CN111162785B (en) | Time division multiplexing sampling circuit and method for analog-digital converter | |
| CN218497025U (en) | Collection system of voltage accumulation value | |
| CN102236769A (en) | Multiplier-divider and method thereof | |
| CN213067622U (en) | Acceleration sensor output current conversion circuit and inertial navigation device | |
| CN104202050A (en) | Multi-path multi-slope non-uniform sampling circuit | |
| RU2298872C1 (en) | Controlled-sensitivity analog-to-digital converter built around microcontroller | |
| CN210742293U (en) | Signal processing circuit of spinning frame spindle speed sensor | |
| CN217741730U (en) | High-capacity MBUS host computer receiving circuit based on singlechip | |
| CN218217338U (en) | Key switch debouncing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |