CN210720608U - Detection circuit and electronic device - Google Patents
Detection circuit and electronic device Download PDFInfo
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- CN210720608U CN210720608U CN201921441854.8U CN201921441854U CN210720608U CN 210720608 U CN210720608 U CN 210720608U CN 201921441854 U CN201921441854 U CN 201921441854U CN 210720608 U CN210720608 U CN 210720608U
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Abstract
The utility model discloses a detection circuit and an electronic device, wherein the detection circuit comprises a signal processing module, and an undervoltage detection module and an overvoltage detection module which are respectively connected with the signal processing module, and the signal processing module comprises a detection result output end; the undervoltage detection module is used for receiving a first voltage signal to be detected and outputting a first abnormal signal when the first voltage signal to be detected is abnormal; the overvoltage detection module is used for receiving a second voltage signal to be detected and outputting a second abnormal signal when the second voltage signal to be detected is abnormal; the signal processing module is used for processing the first abnormal signal and/or the second abnormal signal when receiving the first abnormal signal and/or the second abnormal signal, and outputting an abnormal level signal through a detection result output end, so that the flexibility of the detection circuit is improved, and the hardware cost and the design complexity of a product are effectively reduced.
Description
Technical Field
The utility model relates to a detection circuitry technical field, in particular to detection circuitry and electronic equipment.
Background
Each detection Input port of the conventional detection circuit can only correspond to the same positive signal or negative signal, and the state of positive and negative multipath signals cannot be detected simultaneously in the same detection Input port, and particularly, under the condition that the detection Input port resource is in shortage in a control system, the detection of multipath signal abnormality needs to be realized by expanding the detection Input/Output (I/O) port of a Micro Control Unit (MCU), so that the cost is increased, and the circuit and the software program are relatively complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a detection circuitry and electronic equipment aims at solving the technical problem who improves detection circuitry flexibility on reduce cost's basis.
In order to achieve the above object, the present invention provides a detection circuit, which includes a signal processing module, and an under-voltage detection module and an over-voltage detection module respectively connected to the signal processing module, wherein the signal processing module includes a detection result output end;
the undervoltage detection module is used for receiving a first voltage signal to be detected and outputting a first abnormal signal when the first voltage signal to be detected is abnormal;
the overvoltage detection module is used for receiving a second voltage signal to be detected and outputting a second abnormal signal when the second voltage signal to be detected is abnormal;
and the signal processing module is used for processing the first abnormal signal and/or the second abnormal signal when receiving the first abnormal signal and/or the second abnormal signal and outputting an abnormal level signal through a detection result output end.
Preferably, the undervoltage detection module includes a first diode, a second diode, a third diode, a fourth diode, a first detection signal receiving terminal, a second detection signal receiving terminal, a third detection signal receiving terminal, and a fourth detection signal receiving terminal;
the first end of the first diode is connected with the first detection signal receiving end, and the second end of the first diode is connected with the detection result output end;
the first end of the second diode is connected with the second detection signal receiving end, and the second end of the second diode is connected with the detection result output end;
the first end of the third diode is connected with the third detection signal receiving end, and the second end of the third diode is connected with the detection result output end;
and the first end of the fourth diode is connected with the fourth detection signal receiving end, and the second end of the fourth diode is connected with the detection result output end.
Preferably, the signal processing module further includes a first resistor, a second resistor, a third resistor, a first triode, and a power input terminal;
the first end of the first resistor is connected with the power input end, the second end of the second resistor is connected with the collector of the first triode, the emitter of the first triode is grounded, the base of the first triode is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor, and the second end of the third resistor is grounded;
and the second end of the first resistor is connected with the detection result output end.
Preferably, the overvoltage detection module is a positive voltage overvoltage detection module, the second voltage signal to be detected is a positive voltage detection signal, and the second abnormal signal is a positive voltage abnormal signal, wherein:
the positive pressure overvoltage detection module is used for receiving the positive pressure detection signal and outputting a positive pressure abnormal signal to the signal processing module when the positive pressure detection signal is abnormal.
Preferably, the overvoltage detection module is a negative-pressure overvoltage detection module, the second voltage signal to be detected is a negative-pressure detection signal, and the second abnormal signal is a negative-pressure abnormal signal, where:
the negative pressure overpressure detection module is used for receiving the negative pressure detection signal and outputting a negative pressure abnormal signal to the signal processing module when the negative pressure detection signal is abnormal.
Preferably, the overvoltage detection module includes a positive voltage overvoltage detection module and a negative voltage overvoltage detection module, the second voltage signal to be detected includes a positive voltage detection signal and a negative voltage detection signal, the second abnormal signal includes a positive voltage abnormal signal and a negative voltage abnormal signal, wherein:
the positive pressure overvoltage detection module is used for receiving the positive pressure detection signal and outputting a positive pressure abnormal signal to the signal processing module when the positive pressure detection signal is abnormal;
the negative pressure overvoltage detection module is used for receiving the negative pressure detection signal and outputting a negative pressure abnormal signal to the signal processing module when the negative pressure detection signal is abnormal.
Preferably, the positive voltage overvoltage detection module includes a first zener diode, a second zener diode, a third zener diode, a fourth zener diode, a fifth detection signal receiving terminal, a sixth detection signal receiving terminal, a seventh detection signal receiving terminal, an eighth detection signal receiving terminal, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;
a first end of the fourth resistor is connected with the signal processing module, a second end of the fourth resistor is connected with an anode of the first voltage stabilizing diode, and a cathode of the first voltage stabilizing diode is connected with the fifth detection signal receiving end;
a first end of the fifth resistor is connected with the signal processing module, a second end of the fifth resistor is connected with an anode of the second voltage stabilizing diode, and a cathode of the second voltage stabilizing diode is connected with the sixth detection signal receiving end;
a first end of the sixth resistor is connected with the signal processing module, a second end of the sixth resistor is connected with an anode of the third voltage stabilizing diode, and a cathode of the third voltage stabilizing diode is connected with the seventh detection signal receiving end;
the first end of the seventh resistor is connected with the signal processing module, the second end of the seventh resistor is connected with the anode of the fourth voltage stabilizing diode, and the cathode of the fourth voltage stabilizing diode is connected with the eighth detection signal receiving end.
Preferably, the negative voltage overvoltage detection module includes a power input terminal, a ninth detection signal receiving terminal, an eighth resistor, a ninth resistor, a tenth resistor, a fifth zener diode, and a second triode;
a first end of the eighth resistor is connected with the signal processing module, a second end of the eighth resistor is connected with a collector of the second triode, and an emitter of the second triode is connected with the power input end;
a first end of the ninth resistor is connected with a base electrode of the second triode, a second end of the ninth resistor is connected with a negative electrode of a fifth voltage stabilizing diode, and a positive electrode of the fifth voltage stabilizing diode is connected with a ninth detection signal receiving end;
a first end of the tenth resistor is connected to the power input terminal, and a second end of the tenth resistor is connected to the first end of the ninth resistor.
In order to achieve the above object, the present invention further provides an electronic device, which includes a processor and a detection circuit as described above, wherein the processor is connected to the detection circuit.
Preferably, the electronic device is a sound.
The utility model discloses technical scheme is through setting up detection circuitry detect the last peripheral detection module that sets up a small amount of circuit, peripheral detection module includes under-voltage detection module and excessive pressure detection module, under-voltage detection module and the same detection input port of excessive pressure detection module accessible detect the detected signal of various differences, reach the purpose of excessive pressure and under-voltage detection, under the unchangeable circumstances of MCU resource, realize unified detection control to improve the detection circuitry flexibility, effectively reduce the hardware cost and the design complexity of product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of the detection circuit of the present invention;
fig. 2 is a schematic circuit diagram of another embodiment of the detection circuit of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
The utility model provides a detection circuit.
Referring to fig. 1, the detection circuit according to the present invention includes a signal processing module 10, and an under-voltage detection module 20 and an over-voltage detection module 30 respectively connected to the signal processing module 10, wherein the signal processing module 10 includes a detection result output end.
The undervoltage detection module 20 is configured to receive a first voltage signal to be detected, and output a first abnormal signal when the first voltage signal to be detected is abnormal; the overvoltage detection module 30 is configured to receive a second voltage signal to be detected, and output a second abnormal signal when the second voltage signal to be detected is abnormal.
It should be noted that, the under-voltage detection module 20 detects the voltage signal to be detected by adopting the conductivity of a common diode, wherein the first voltage signal to be detected, which is accessed by the under-voltage detection module 20, is a direct current voltage with different positive voltage values, when the voltage signal to be detected is lower than a preset threshold value, an abnormal signal is generated to the signal processing module 10, the signal processing module 10 is configured to process the first abnormal signal and the second abnormal signal when receiving the first abnormal signal and the second abnormal signal, and output an abnormal level signal through a detection result output end, because the signal processing module 10 outputs a high level voltage signal, i.e. a normal signal, when the under-voltage detection module 20 generates an abnormal signal, the voltage of the signal processing module 10 is pulled down, so that the signal processing module 10 outputs a low voltage abnormal level signal, and the undervoltage detection of the direct-current voltages with different positive voltage values is realized.
In an embodiment, the overvoltage detection module 30 is a positive voltage overvoltage detection module 40, the second voltage signal to be detected is a positive voltage detection signal, and the second abnormal signal is a positive voltage abnormal signal, where:
the positive pressure overvoltage detection module 40 is configured to receive the positive pressure detection signal, and output a positive pressure abnormal signal to the signal processing module 10 when the positive pressure detection signal is abnormal.
In this embodiment, the positive voltage overvoltage detection module 40 detects an accessed voltage signal to be detected by using a zener diode, wherein the positive voltage detection signal accessed by the positive voltage overvoltage detection module 40 is a dc voltage with different positive voltage values, when the dc voltage exceeds the withstand voltage of the corresponding zener diode, i.e., breakdown and conduction, an abnormal signal is generated to the signal processing module 10, because the signal processing module 10 outputs high level voltage information, i.e., a normal signal, when the positive voltage overvoltage detection module 40 generates an abnormal signal, the signal processing module 10 is grounded, so that the signal processing module 10 outputs a low voltage abnormal level signal, and overvoltage detection of dc voltages with different positive voltage values is realized.
In an embodiment, the overvoltage detection module 30 is a negative voltage overvoltage detection module 50, the second voltage signal to be detected is a negative voltage detection signal, and the second abnormal signal is a negative voltage abnormal signal, where:
the negative pressure overpressure detection module 50 is configured to receive the negative pressure detection signal, and output a negative pressure abnormal signal to the signal processing module 10 when the negative pressure detection signal is abnormal.
The negative voltage overvoltage detection module 50 performs level conversion by adopting a triode to detect an accessed voltage signal to be detected, wherein the negative voltage detection signal accessed by the negative voltage overvoltage detection module 50 is a voltage with a negative voltage value, and when the voltage with the negative voltage value is lower than the voltage resistance of a corresponding voltage stabilizing diode, namely breakdown conduction is performed, an abnormal signal is generated to the signal processing module 10, and because the signal processing module 10 outputs high-level voltage information, namely a normal signal, when the negative voltage overvoltage detection module 50 generates the abnormal signal, the signal processing module 10 is grounded, the signal processing module 10 is caused to output the abnormal level signal with low voltage, and the detection of the voltage with the negative voltage value is realized.
In an embodiment, the overvoltage detection module 30 includes a positive voltage overvoltage detection module 40 and a negative voltage overvoltage detection module 50, the second voltage signal to be detected includes a positive voltage detection signal and a negative voltage detection signal, and the second abnormal signal includes a positive voltage abnormal signal and a negative voltage abnormal signal, where: the positive pressure overvoltage detection module 40 is configured to receive the positive pressure detection signal, and output a positive pressure abnormal signal to the signal processing module 10 when the positive pressure detection signal is abnormal; the negative pressure overvoltage detection module 50 is configured to receive the negative pressure detection signal, and output a negative pressure abnormal signal to the signal processing module 10 when the negative pressure detection signal is abnormal.
In this embodiment, the conduction of the common diode, the overvoltage breakdown characteristic of the zener diode and the level conversion of the triode are adopted to realize the overvoltage and undervoltage detection of multiple paths of positive and negative voltages, and the signals are converged into one path of signal output, so that the intelligent detection and judgment circuit with tight resources is met, the purpose of intelligent detection can be realized, and the hardware resource of the MCU is effectively prevented from being wasted.
In specific implementation, the detection circuits can add or delete corresponding parts according to actual needs, and cannot influence each other, and various detection circuits are flexibly combined.
This embodiment technical scheme is through setting up detection circuitry set up a small amount of peripheral detection module on the detection circuitry, peripheral detection module includes undervoltage detection module 20 and overvoltage detection module 30, undervoltage detection module 20 and overvoltage detection module 30 accessible are the same detection input port and are detected the detected signal of various differences, reach the purpose of excessive pressure and undervoltage detection, under the unchangeable condition of MCU resource, realize unified detection control to improve the detection circuitry flexibility, effectively reduce the hardware cost and the design complexity of product.
Referring to fig. 2, the brown-out detection module 20 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first detection signal receiving terminal, a second detection signal receiving terminal, a third detection signal receiving terminal, and a fourth detection signal receiving terminal; a first end of the first diode D1 is connected to the first detection signal receiving end, and a second end of the first diode D1 is connected to the detection result output end; a first end of the second diode D2 is connected to the second detection signal receiving end, and a second end of the second diode D2 is connected to the detection result output end; a first end of the third diode D3 is connected to the third detection signal receiving end, and a second end of the third diode D3 is connected to the detection result output end; a first end of the fourth diode D4 is connected to the fourth detection signal receiving end, and a second end of the fourth diode D4 is connected to the detection result output end.
In this embodiment, the first detection signal receiving terminal, the second detection signal receiving terminal, the third detection signal receiving terminal, and the fourth detection signal receiving terminal are configured to receive direct-current voltage signals with different voltage values; the signal processing module 10 is connected to output a low level signal through the detection result output end when the voltage signal to be detected received by the first detection signal receiving end, the second detection signal receiving end, the third detection signal receiving end and the fourth detection signal receiving end is lower than a first preset threshold value.
It should be noted that the voltage signals to be detected received by the first detection signal receiving terminal, the second detection signal receiving terminal, the third detection signal receiving terminal, and the fourth detection signal receiving terminal may be 5V _ D direct current, 3.3V _ D direct current, 12V _ D direct current, 3.3V direct current of the frequency modulation device, and may also be direct current power signals of other devices.
Further, the signal processing module 10 further includes a first resistor R1, a second resistor R2, a third resistor R3, a first transistor Q1, and a power input terminal; a first end of the first resistor R1 is connected to the power input terminal, a second end of the second resistor R2 is connected to a collector of the first transistor Q1, an emitter of the first transistor Q1 is grounded, a base of the first transistor Q1 is connected to a first end of the second resistor R2, a second end of the second resistor R2 is connected to a first end of the third resistor R3, and a second end of the third resistor R3 is grounded; a second end of the first resistor R1 is connected to the detection result output end.
It should be noted that, in a normal state, the base of the first triode Q1 is connected to a low level through the second resistor R2 and the third resistor R3, the first triode Q1 is not turned on, and the output terminal of the detection result is connected to a pull-up terminal because of the first resistor R1, and at this time, a high level of the detection normal signal is output.
In this embodiment, the detection result output terminal is connected to the second terminals of the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4, so as to obtain the output signal of the under-voltage detection module 20.
Further, the positive voltage overvoltage detection module 40 includes a first zener diode U1, a second zener diode U2, a third zener diode U3, a fourth zener diode U4, a fifth detection signal receiving terminal, a sixth detection signal receiving terminal, a seventh detection signal receiving terminal, an eighth detection signal receiving terminal, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7.
A first end of the fourth resistor R4 is connected to the signal processing module 10, a second end of the fourth resistor R4 is connected to an anode of the first zener diode U1, and a cathode of the first zener diode U1 is connected to the fifth detection signal receiving terminal.
A first end of the fifth resistor R5 is connected to the signal processing module 10, a second end of the fifth resistor R5 is connected to an anode of the second zener diode U2, and a cathode of the second zener diode U2 is connected to the sixth detection signal receiving terminal.
A first end of the sixth resistor R6 is connected to the signal processing module 10, a second end of the sixth resistor R6 is connected to an anode of the third zener diode U3, and a cathode of the third zener diode U3 is connected to the seventh detection signal receiving terminal.
A first end of the seventh resistor R7 is connected to the signal processing module 10, a second end of the seventh resistor R7 is connected to an anode of the fourth zener diode U4, and a cathode of the fourth zener diode U4 is connected to the eighth detection signal receiving terminal.
It should be noted that the fifth detection signal receiving terminal, the sixth detection signal receiving terminal, the seventh detection signal receiving terminal, and the eighth detection signal receiving terminal are configured to receive a standby voltage signal, a dc voltage signal with different positive voltage values, and an ac voltage signal.
The signal processing module 10 is connected to output a low level signal through the detection result output end when the voltage signals to be detected received by the fifth detection signal receiving end, the sixth detection signal receiving end, the seventh detection signal receiving end and the eighth detection signal receiving end are higher than a second preset threshold.
In this embodiment, the fifth detection signal receiving terminal, the sixth detection signal receiving terminal, the seventh detection signal receiving terminal, and the eighth detection signal receiving terminal receive positive voltage signals, such as 5V _ D direct current, STB _3.3V, 12V _ D direct current, and AC28V alternating current voltage, and break down and conduct when the voltage signal of the voltage to be detected exceeds the voltage resistance of the corresponding zener diode; the corresponding voltage is supplied to the base of the first triode Q1 through the second resistor R2 after forming a voltage division circuit with the third resistor R3 through the corresponding current limiting resistor, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7, so that the current limiting resistor, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7 are conducted; namely, the level of the output end of the detection result is equivalent to the ground, and the low level of the abnormal detection signal is output at the moment, so that the overvoltage detection is carried out on different positive voltage signals.
Further, the negative over-voltage detection module 50 includes a power input terminal, a ninth detection signal receiving terminal, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a fifth zener diode U5, and a second transistor Q2.
A first end of the eighth resistor R8 is connected to the signal processing module 10, a second end of the eighth resistor R8 is connected to a collector of the second transistor Q2, and an emitter of the second transistor Q2 is connected to the power input terminal.
A first end of the ninth resistor R9 is connected to the base of the second transistor Q2, a second end of the ninth resistor R9 is connected to the cathode of the fifth zener diode U5, and the anode of the fifth zener diode U5 is connected to the ninth detection signal receiving terminal.
A first terminal of the tenth resistor R10 is connected to the power input terminal, and a second terminal of the tenth resistor R10 is connected to a first terminal of the ninth resistor R9.
The signal processing module 10 is connected to output a low level signal through the detection result output end when the voltage signal to be detected received by the ninth detection signal receiving end is lower than a third preset threshold.
It should be noted that, the ninth detection signal receiving terminal of the negative voltage overvoltage detection module 50 receives a negative voltage signal, for example, a negative voltage signal of-24V, and may also be a voltage signal of another parameter, which is not limited in this embodiment, so that when the detected voltage of-24V is in a normal condition, the voltage does not exceed the voltage withstanding of the corresponding zener diode, at this time, the base voltage of the second triode Q2 is pulled up due to the tenth resistor R10, so that the second triode Q2 does not conduct to work, but the base of the first triode Q1 is grounded through the second resistor R2 and the third resistor R3 and is also not conducted, at this time, the detection result output terminal outputs a high level of the detected normal signal; when the detected voltage is lower than the voltage of the corresponding voltage stabilizing diode by 24V, the fifth voltage stabilizing diode U5 is broken down and conducted; the negative voltage is divided by a ninth resistor R9 and a tenth resistor R10 and then supplied to the base of a second triode Q2, the second triode Q2 is conducted, the collector of the second triode Q2 outputs high level, the voltage is divided by an eighth resistor R8 and a third resistor R3, the high level is supplied to the base of the first triode Q1 through the second resistor R2, the base is conducted, namely, the level of the output end of the detection result is equivalent to the ground, and the low level of the detection abnormal signal is output at the moment, so that the detection of the negative voltage is realized.
In order to achieve the above object, the present invention further provides an electronic device, which includes a processor and a detection circuit as described above, wherein the processor is connected to the detection circuit.
It should be noted that the electronic device may be a sound, and the detection circuit may also be a device and a system which have stable power requirements and a self-checking function, such as a high-grade sound system, a high-end instrument, and an automatic control machine; when the abnormity of a certain power supply is detected, signals are fed back to the processor in time to indicate power supply fault codes, so that the problem is prevented from further spreading and the fault position is accurately positioned.
This embodiment technical scheme, electronic equipment includes the treater and as above detection circuitry through setting up detection circuitry set up a small amount of peripheral detection module on the detection circuitry, peripheral detection module includes undervoltage detection module and overvoltage detection module, overvoltage detection module and overvoltage detection module accessible realize that overvoltage and undervoltage detect with the same detection input port, under the unchangeable condition of MCU resource, realize unified detection control to improve detection circuitry flexibility, effectively reduce the hardware cost and the design complexity of product.
Since the electronic device adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
On only do the preferred embodiment of the utility model discloses a not consequently restrict the patent scope of the utility model, all be in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the utility model specification and drawing was done, or direct/indirect application all is included in other relevant technical field the utility model discloses a within range is protected to the patent.
Claims (10)
1. The detection circuit is characterized by comprising a signal processing module, an undervoltage detection module and an overvoltage detection module, wherein the undervoltage detection module and the overvoltage detection module are respectively connected with the signal processing module;
the undervoltage detection module is used for receiving a first voltage signal to be detected and outputting a first abnormal signal when the first voltage signal to be detected is abnormal;
the overvoltage detection module is used for receiving a second voltage signal to be detected and outputting a second abnormal signal when the second voltage signal to be detected is abnormal;
and the signal processing module is used for processing the first abnormal signal and/or the second abnormal signal when receiving the first abnormal signal and/or the second abnormal signal and outputting an abnormal level signal through a detection result output end.
2. The detection circuit of claim 1, wherein the brown-out detection module comprises a first diode, a second diode, a third diode, and a fourth diode, a first detection signal receiving terminal, a second detection signal receiving terminal, a third detection signal receiving terminal, and a fourth detection signal receiving terminal;
the first end of the first diode is connected with the first detection signal receiving end, and the second end of the first diode is connected with the detection result output end;
the first end of the second diode is connected with the second detection signal receiving end, and the second end of the second diode is connected with the detection result output end;
the first end of the third diode is connected with the third detection signal receiving end, and the second end of the third diode is connected with the detection result output end;
and the first end of the fourth diode is connected with the fourth detection signal receiving end, and the second end of the fourth diode is connected with the detection result output end.
3. The detection circuit of claim 1, wherein the signal processing module further comprises a first resistor, a second resistor, a third resistor, a first transistor, and a power input;
the first end of the first resistor is connected with the power input end, the second end of the second resistor is connected with the collector of the first triode, the emitter of the first triode is grounded, the base of the first triode is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor, and the second end of the third resistor is grounded;
and the second end of the first resistor is connected with the detection result output end.
4. The detection circuit according to any one of claims 1 to 3, wherein the overvoltage detection module is a positive voltage overvoltage detection module, the second voltage signal to be detected is a positive voltage detection signal, and the second abnormal signal is a positive voltage abnormal signal, wherein:
the positive pressure overvoltage detection module is used for receiving the positive pressure detection signal and outputting a positive pressure abnormal signal to the signal processing module when the positive pressure detection signal is abnormal.
5. The detection circuit according to any one of claims 1 to 3, wherein the overvoltage detection module is a negative voltage overvoltage detection module, the second voltage signal to be detected is a negative voltage detection signal, and the second abnormal signal is a negative voltage abnormal signal, wherein:
the negative pressure overpressure detection module is used for receiving the negative pressure detection signal and outputting a negative pressure abnormal signal to the signal processing module when the negative pressure detection signal is abnormal.
6. The detection circuit according to any one of claims 1 to 3, wherein the overvoltage detection module comprises a positive voltage overvoltage detection module and a negative voltage overvoltage detection module, the second voltage signal to be detected comprises a positive voltage detection signal and a negative voltage detection signal, and the second abnormal signal comprises a positive voltage abnormal signal and a negative voltage abnormal signal, wherein:
the positive pressure overvoltage detection module is used for receiving the positive pressure detection signal and outputting a positive pressure abnormal signal to the signal processing module when the positive pressure detection signal is abnormal;
the negative pressure overpressure detection module is used for receiving the negative pressure detection signal and outputting a negative pressure abnormal signal to the signal processing module when the negative pressure detection signal is abnormal.
7. The detection circuit according to claim 4, wherein the positive voltage overvoltage detection module comprises a first zener diode, a second zener diode, a third zener diode, a fourth zener diode, a fifth detection signal receiving terminal, a sixth detection signal receiving terminal, a seventh detection signal receiving terminal, an eighth detection signal receiving terminal, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;
a first end of the fourth resistor is connected with the signal processing module, a second end of the fourth resistor is connected with an anode of the first voltage stabilizing diode, and a cathode of the first voltage stabilizing diode is connected with the fifth detection signal receiving end;
a first end of the fifth resistor is connected with the signal processing module, a second end of the fifth resistor is connected with an anode of the second voltage stabilizing diode, and a cathode of the second voltage stabilizing diode is connected with the sixth detection signal receiving end;
a first end of the sixth resistor is connected with the signal processing module, a second end of the sixth resistor is connected with an anode of the third voltage stabilizing diode, and a cathode of the third voltage stabilizing diode is connected with the seventh detection signal receiving end;
the first end of the seventh resistor is connected with the signal processing module, the second end of the seventh resistor is connected with the anode of the fourth voltage stabilizing diode, and the cathode of the fourth voltage stabilizing diode is connected with the eighth detection signal receiving end.
8. The detection circuit according to claim 5, wherein the negative over-voltage detection module comprises a power input terminal, a ninth detection signal receiving terminal, an eighth resistor, a ninth resistor, a tenth resistor, a fifth zener diode, and a second triode;
a first end of the eighth resistor is connected with the signal processing module, a second end of the eighth resistor is connected with a collector of the second triode, and an emitter of the second triode is connected with the power input end;
a first end of the ninth resistor is connected with a base electrode of the second triode, a second end of the ninth resistor is connected with a negative electrode of a fifth voltage stabilizing diode, and a positive electrode of the fifth voltage stabilizing diode is connected with a ninth detection signal receiving end;
a first end of the tenth resistor is connected to the power input terminal, and a second end of the tenth resistor is connected to the first end of the ninth resistor.
9. An electronic device, characterized in that the electronic device comprises a processor and a detection circuit according to any one of claims 1 to 8, the processor being connected to the detection circuit.
10. The electronic device of claim 9, wherein the electronic device is a sound.
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| CN201921441854.8U CN210720608U (en) | 2019-08-30 | 2019-08-30 | Detection circuit and electronic device |
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| CN201921441854.8U CN210720608U (en) | 2019-08-30 | 2019-08-30 | Detection circuit and electronic device |
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