Integrated circuit voltage detection circuit

Abstract

The utility model discloses an integrated circuit voltage detection circuit, which relates to the technical field of integrated circuits, and comprises a power supply module used for supplying power; the integrated circuit module is used for receiving electric energy and is connected with an integrated circuit; the voltage sampling module is used for voltage sampling and signal transmission; the timing control module is used for setting timing time and regularly controlling the sampling and holding module to carry out signal sampling processing, and after timing is finished, the sampling and holding module carries out signal holding processing; and the change judgment module is used for comparing whether the voltage of the sampled signal is equal to the voltage of the held signal and displaying the unequal voltage. The integrated circuit voltage detection circuit provided by the utility model can carry out voltage change monitoring on a signal after sampling and holding and a signal sampled in real time, can display the voltage change when the voltage changes, and can rapidly detect whether the integrated circuit connected with the integrated circuit module has the voltage change.

Description

Technical Field

[0001] This utility model relates to the field of integrated circuit technology, specifically an integrated circuit voltage detection circuit. Background Technology

[0002] For integrated circuits, a stable voltage signal enables them to operate stably. If the voltage fluctuates, it will have a certain impact on the integrated circuit. In order to monitor the voltage change status of the integrated circuit at all times, the voltage detection circuit of the integrated circuit in the existing technology is generally composed of resistors and comparators. The voltage of the integrated circuit is sampled and compared with the sampled voltage signal by a set voltage threshold to determine the voltage status. However, this method cannot quickly and effectively detect the voltage fluctuation status of the integrated circuit, so it needs to be improved. Utility Model Content

[0003] This utility model provides an integrated circuit voltage detection circuit to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An integrated circuit voltage detection circuit includes: a power supply module, an integrated circuit module, a voltage sampling module, a timing control module, a sample and hold module, and a change judgment module;

[0006] The power module is used to receive DC power and perform voltage regulation on the DC power, and output the first power and the second power.

[0007] An integrated circuit module, connected to the power module, is used to transmit first electrical energy to the connected integrated circuit;

[0008] The voltage sampling module is connected to the power supply module, integrated circuit, sample and hold module and change judgment module. It is used to sample the voltage of the first electrical energy received by the integrated circuit module and output the first sampling signal. When the second electrical energy is received, the first sampling signal is transmitted to the sample and hold module and the change judgment module.

[0009] A timing control module, connected to the power module, is used to set a timing period and output a first control signal upon receiving the second electrical energy. After the timing period ends, the output of the first control signal stops.

[0010] The sample-and-hold module, connected to the timing control module, is used to store and voltage-follow the first sample signal when a first control signal is received, and to hold the stored first sample signal and output a first hold signal when the first control signal is stopped being received.

[0011] The change judgment module, connected to the power supply module and the sample-and-hold module, is used to receive the second electrical energy and compare the voltage magnitude of the first holding signal with that of the first sample signal. When the voltages of the first sample signal and the first holding signal are not equal, the module displays the voltage inequality.

[0012] As a further embodiment of this utility model: the power module includes a power interface, a first capacitor, an adjustable voltage regulator, a first voltage regulator, a second capacitor, and a first push-button switch; the integrated circuit module includes an integrated circuit interface;

[0013] Preferably, the first end of the power interface is connected to the input end of the adjustable voltage regulator and the IN end of the first voltage regulator, and is connected to the second end of the power interface, the ground end of the adjustable voltage regulator, the GND end of the first voltage regulator, one end of the second capacitor, the ground end and the ground end of the integrated circuit interface through the first capacitor. The output end of the adjustable voltage regulator is connected to the power supply end of the voltage sampling module and the integrated circuit interface. The OUT end of the first voltage regulator is connected to the other end of the second capacitor and the moving end of the first push-button switch. The stationary end of the first push-button switch is connected to the timing control module and the change judgment module.

[0014] As a further improvement of this utility model: the voltage sampling module includes a first resistor, a second resistor, a first analog switch and a third resistor;

[0015] Preferably, one end of the first resistor is connected to the power supply terminal of the integrated circuit interface, the other end of the first resistor is connected to the IN terminal of the first analog switch and connected to the ground terminal of the integrated circuit interface through the second resistor, the CTRL terminal of the first analog switch is connected to the stationary terminal of the first push button switch through the third resistor, and the OUT terminal of the first analog switch is connected to the sample-and-hold module and the change judgment module.

[0016] As a further embodiment of this utility model: the sample-and-hold module includes a first operational amplifier, a second analog switch, a fourth resistor, a fifth resistor, a third capacitor, a second operational amplifier, and a sixth resistor;

[0017] Preferably, the non-inverting input of the first operational amplifier is connected to the OUT terminal of the first analog switch, the output terminal of the first operational amplifier is connected to the IN terminal of the second analog switch, the CTRL terminal of the second analog switch is connected to the timing control module, the OUT terminal of the second analog switch is connected to one end of the third capacitor and one end of the fifth resistor through the fourth resistor, the other end of the fifth resistor is connected to the non-inverting input of the second operational amplifier, and the inverting input of the second operational amplifier is connected to the output terminal of the second operational amplifier, the inverting input of the first operational amplifier, and the change judgment module through the sixth resistor.

[0018] As a further embodiment of this utility model: the change judgment module includes a first comparator, a second comparator, a first diode, a second diode, a first switching transistor, a first indicator light, and a seventh resistor;

[0019] Preferably, the non-inverting input of the first comparator is connected to the inverting input of the second comparator and the output of the second operational amplifier; the inverting input of the first comparator is connected to the non-inverting input of the second comparator and the OUT terminal of the first analog switch; the output of the first comparator is connected to the anode of the first diode; the output of the second comparator is connected to the anode of the second diode; the cathode of the second diode is connected to the cathode of the first diode and the base of the first switching transistor; the emitter of the first switching transistor is grounded; the collector of the first switching transistor is connected to the cathode of the first indicator light; and the anode of the first indicator light is connected to the moving terminal of the first push-button switch through a seventh resistor.

[0020] As a further improvement of this utility model: the timing control module includes a third diode, an eighth resistor, a fourth capacitor, a first timer, and a fifth capacitor;

[0021] Preferably, the cathode of the third diode is connected to the moving terminal of the first push-button switch, the fourth and eighth terminals of the first timer, and the anode of the third diode, one end of the fourth capacitor, the sixth and second terminals of the first timer, through the eighth resistor. The fifth terminal of the first timer is connected to the other end of the fourth capacitor, the first terminal of the first timer, and the ground terminal through the fifth capacitor. The third terminal of the first timer is connected to the CTRL terminal of the second analog switch.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: The integrated circuit voltage detection circuit of this utility model can sample the voltage of the integrated circuit module through the voltage sampling module. When the power supply module supplies power to the timing control module and the voltage sampling module, the timing control module will control the sample-and-hold module to sample and process the signal output by the voltage sampling module. After the timing ends, the sample-and-hold process is performed. In conjunction with the change judgment module, the voltage change of the sampled and held signal and the real-time sampled signal are monitored. When the voltage changes, the voltage change is displayed. There is no need to set the voltage threshold in advance, and the voltage change of the integrated circuit connected to the integrated circuit module can be quickly detected. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic block diagram of an integrated circuit voltage detection circuit provided as an example of the present invention.

[0025] Figure 2 A circuit diagram of an integrated circuit voltage detection circuit provided for an example of this utility model.

[0026] Figure 3 The connection circuit diagram of the timing control module provided for this utility model embodiment. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In one embodiment, see Figure 1 An integrated circuit voltage detection circuit includes: a power supply module 1, an integrated circuit module 2, a voltage sampling module 3, a timing control module 4, a sample and hold module 5, and a change judgment module 6.

[0029] Specifically, power module 1 is used to receive DC power and perform voltage regulation on DC power, and output first power and second power.

[0030] Integrated circuit module 2, connected to the power supply module 1, is used to transmit the first electrical energy to the connected integrated circuit;

[0031] The voltage sampling module 3 is connected to the power supply module 1, the integrated circuit, the sample and hold module 5 and the change judgment module 6. It is used to sample the voltage of the first electrical energy received by the integrated circuit module 2 and output the first sampling signal. When the second electrical energy is received, the first sampling signal is transmitted to the sample and hold module 5 and the change judgment module 6.

[0032] The timing control module 4, connected to the power module 1, is used to set a timing period and output a first control signal at a set time when the second electrical energy is received. In a specific embodiment, the output of the first control signal stops after the timing period ends.

[0033] The sample-and-hold module 5 is connected to the timing control module 4 and is used to store and voltage follow the first sample signal when the first control signal is received, and to hold the stored first sample signal and output the first hold signal when the first control signal is stopped.

[0034] The change judgment module 6 is connected to the power supply module 1 and the sample and hold module 5. It is used to receive the second electrical energy and compare the voltage of the first hold signal with that of the first sample signal. When the voltages of the first sample signal and the first hold signal are not equal, it displays the voltage inequality.

[0035] In a specific embodiment, the power module 1 can be a power circuit composed of a power interface, an adjustable voltage regulator, a button, and a voltage regulator. It can accept DC power and perform adjustable voltage regulation and stabilization on the DC power, and output a first power and a second power respectively. The second power is transmitted through the button. The power module 1 needs to maintain a constant and stable voltage. The integrated circuit module 2 can be an integrated interface circuit composed of an integrated circuit interface and connected to the integrated circuit. The voltage sampling module 3 can be a voltage sampling circuit composed of a resistor and an analog switch for voltage sampling and signal transmission control. The timing control module 4 can be a timing control circuit composed of a resistor and an analog switch. The timing control circuit, composed of timers, resistors, capacitors, etc., can set the timing period and output a high-level signal (the first control signal) when powered on. After the timing period ends, the output of the first control signal stops. The sample-and-hold module 5 can be a sample-and-hold circuit composed of operational amplifiers, analog switches, capacitors, etc., which can perform signal sampling and transmission processing and signal sampling and holding processing. The change judgment module 6 can be a change judgment circuit composed of comparators, transistors, indicator lights, etc., which can detect whether the voltage output by the sample-and-hold module 5 and the voltage output by the voltage sampling module 3 are equal, and display the result if they are not equal.

[0036] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface, a first capacitor C1, an adjustable voltage regulator, a first voltage regulator IC3, a second capacitor C2, and a first push-button switch S1; the integrated circuit module 2 includes an integrated circuit interface.

[0037] Specifically, the first end of the power interface is connected to the input end of the adjustable voltage regulator and the IN end of the first voltage regulator IC3, and is connected to the second end of the power interface, the ground end of the adjustable voltage regulator, the GND end of the first voltage regulator IC3, one end of the second capacitor C2, the ground end and the ground end of the integrated circuit interface through the first capacitor C1. The output end of the adjustable voltage regulator is connected to the voltage sampling module 3 and the power end of the integrated circuit interface. The OUT end of the first voltage regulator IC3 is connected to the other end of the second capacitor C2 and the moving end of the first push button switch S1. The stationary end of the first push button switch S1 is connected to the timing control module 4 and the change judgment module 6.

[0038] In a specific embodiment, the adjustable voltage regulator can be composed of an LM317 voltage regulator, a capacitor, and a resistor to perform adjustable voltage regulation; the first voltage regulator IC3 can be a 7805 voltage regulator.

[0039] Furthermore, the voltage sampling module 3 includes a first resistor R1, a second resistor R2, a first analog switch IC1, and a third resistor R3;

[0040] Specifically, one end of the first resistor R1 is connected to the power supply terminal of the integrated circuit interface, the other end of the first resistor R1 is connected to the IN terminal of the first analog switch IC1 and connected to the ground terminal of the integrated circuit interface through the second resistor R2, the CTRL terminal of the first analog switch IC1 is connected to the stationary terminal of the first push button switch S1 through the third resistor R3, and the OUT terminal of the first analog switch IC1 is connected to the sampling and holding module 5 and the change judgment module 6.

[0041] In a specific embodiment, the first resistor R1 and the second resistor R2 are used for voltage sampling; the first analog switch IC1 can be a CD4066 analog switch.

[0042] Furthermore, the sample-and-hold module 5 includes a first operational amplifier OP1, a second analog switch IC2, a fourth resistor R4, a fifth resistor R5, a third capacitor C3, a second operational amplifier OP2, and a sixth resistor R6;

[0043] Specifically, the non-inverting input of the first operational amplifier OP1 is connected to the OUT input of the first analog switch IC1, the output input of the first operational amplifier OP1 is connected to the IN input of the second analog switch IC2, the CTRL input of the second analog switch IC2 is connected to the timing control module 4, the OUT input of the second analog switch IC2 is connected to one end of the third capacitor C3 and one end of the fifth resistor R5 through the fourth resistor R4, the other end of the fifth resistor R5 is connected to the non-inverting input of the second operational amplifier OP2, and the inverting input of the second operational amplifier OP2 is connected to the output input of the second operational amplifier OP2, the inverting input of the first operational amplifier OP1, and the change judgment module 6 through the sixth resistor R6.

[0044] In a specific embodiment, the first operational amplifier OP1 and the second operational amplifier OP2 can both be selected as OP07 operational amplifiers; the second analog switch IC2 can be selected as CD4066 chip, which controls the third capacitor C3 to perform sampling storage and sample-and-hold operations.

[0045] Furthermore, the change judgment module 6 includes a first comparator A1, a second comparator A2, a first diode D1, a second diode D2, a first switching transistor V1, a first indicator LED1, and a seventh resistor R7;

[0046] Specifically, the non-inverting input of the first comparator A1 is connected to the inverting input of the second comparator A2 and the output of the second operational amplifier OP2. The inverting input of the first comparator A1 is connected to the non-inverting input of the second comparator A2 and the OUT terminal of the first analog switch IC1. The output of the first comparator A1 is connected to the anode of the first diode D1. The output of the second comparator A2 is connected to the anode of the second diode D2. The cathode of the second diode D2 is connected to the cathode of the first diode D1 and the base of the first switching transistor V1. The emitter of the first switching transistor V1 is grounded. The collector of the first switching transistor V1 is connected to the cathode of the first indicator LED1. The anode of the first indicator LED1 is connected to the moving terminal of the first push-button switch S1 through the seventh resistor R7.

[0047] In a specific embodiment, both the first comparator A1 and the second comparator A2 can be LM358 comparators; the first switching transistor V1 can be an NPN transistor; and the first indicator LED1 can be an LED.

[0048] Furthermore, the timing control module 4 includes a third diode D3, an eighth resistor R8, a fourth capacitor C4, a first timer IC4, and a fifth capacitor C5;

[0049] Specifically, the cathode of the third diode D3 is connected to the moving terminal of the first push-button switch S1, the fourth and eighth terminals of the first timer IC4, and the anode of the third diode D3, one end of the fourth capacitor C4, the sixth and second terminals of the first timer IC4, through the eighth resistor R8. The fifth terminal of the first timer IC4 is connected to the other end of the fourth capacitor C4, the first terminal of the first timer IC4, and the ground terminal through the fifth capacitor C5. The third terminal of the first timer IC4 is connected to the CTRL terminal of the second analog switch IC2.

[0050] In a specific embodiment, the first timer IC4 mentioned above can be an NE555 timer.

[0051] In this embodiment of an integrated circuit voltage detection circuit, DC power is connected via a power interface, and an adjustable voltage regulator performs adjustable voltage regulation to power the integrated circuit connected to the integrated circuit interface. A first voltage regulator IC3 performs voltage regulation. When the first push-button switch S1 is closed, the first analog switch IC1 is turned on, and the first timer IC4 is powered. The first resistor R1 and the second resistor R2 sample the voltage input to the integrated circuit, which is then transmitted by the first analog switch IC1. The first timer IC4, in conjunction with the third diode D3, the eighth resistor R8, the fourth capacitor C4, and the fifth capacitor C5, performs timing operation and controls the second analog switch IC2 to turn on, so that the signal sampled by the first operational amplifier OP1 passes through the first analog switch IC2. After the second analog switch IC2 and the fourth resistor R4 transmit the signal, it is stored by the third capacitor C3 until the timing operation stops. The second analog switch IC2 is turned off, the third capacitor C3 holds the sampled signal, and outputs it after processing by the fifth capacitor C5 and the second operational amplifier OP2. At this time, the first comparator A1 and the second comparator A2 will compare the voltage of the sampled and held signal with the signal transmitted by the first analog switch IC1. When the voltage of the real-time sampled signal is not equal to that of the sampled signal, the first comparator A1 or the second comparator A2 will output a high level, so that the first switch V1 is turned on and the first indicator LED1 is lit. Then, it can quickly detect whether there is a voltage change in the integrated circuit connected to the integrated circuit module 2.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated circuit voltage detection circuit, characterized in that, The integrated circuit voltage detection circuit includes: a power supply module, an integrated circuit module, a voltage sampling module, a timing control module, a sample and hold module, and a change judgment module; The power module is used to receive DC power and perform voltage regulation on the DC power, and output first power and second power. The integrated circuit module is connected to the power module and is used to transmit the first electrical energy to the connected integrated circuit. The voltage sampling module is connected to the power supply module, integrated circuit, sample and hold module and change judgment module. It is used to sample the voltage of the first electrical energy received by the integrated circuit module and output the first sampling signal. When the second electrical energy is received, the first sampling signal is transmitted to the sample and hold module and the change judgment module. The timing control module is connected to the power module and is used to set the timing period. When the second electrical energy is received, the first control signal is output at the specified time. After the timing period ends, the output of the first control signal is stopped. The sample-and-hold module is connected to the timing control module and is used to store and voltage-follow the first sample signal when the first control signal is received, and to hold the stored first sample signal and output the first hold signal when the first control signal is stopped. The change judgment module is connected to the power supply module and the sample-and-hold module. It is used to receive the second electrical energy and compare the voltage of the first holding signal with that of the first sample signal. When the voltages of the first sample signal and the first holding signal are not equal, it displays the voltage inequality.

2. The integrated circuit voltage detection circuit according to claim 1, characterized in that, The power module includes a power interface, a first capacitor, an adjustable voltage regulator, a first voltage regulator, a second capacitor, and a first push-button switch; the integrated circuit module includes an integrated circuit interface. The first end of the power interface is connected to the input end of the adjustable voltage regulator and the IN end of the first voltage regulator, and is connected to the second end of the power interface, the ground end of the adjustable voltage regulator, the GND end of the first voltage regulator, one end of the second capacitor, the ground end and the ground end of the integrated circuit interface through the first capacitor. The output end of the adjustable voltage regulator is connected to the power supply end of the voltage sampling module and the integrated circuit interface. The OUT end of the first voltage regulator is connected to the other end of the second capacitor and the moving end of the first push button switch. The stationary end of the first push button switch is connected to the timing control module and the change judgment module.

3. The integrated circuit voltage detection circuit according to claim 2, characterized in that, The voltage sampling module includes a first resistor, a second resistor, a first analog switch, and a third resistor; One end of the first resistor is connected to the power supply terminal of the integrated circuit interface, and the other end of the first resistor is connected to the IN terminal of the first analog switch and connected to the ground terminal of the integrated circuit interface through the second resistor. The CTRL terminal of the first analog switch is connected to the stationary terminal of the first push button switch through the third resistor. The OUT terminal of the first analog switch is connected to the sample-and-hold module and the change judgment module.

4. The integrated circuit voltage detection circuit according to claim 3, characterized in that, The sample-and-hold module includes a first operational amplifier, a second analog switch, a fourth resistor, a fifth resistor, a third capacitor, a second operational amplifier, and a sixth resistor; The non-inverting input of the first operational amplifier is connected to the OUT terminal of the first analog switch, the output terminal of the first operational amplifier is connected to the IN terminal of the second analog switch, the CTRL terminal of the second analog switch is connected to the timing control module, the OUT terminal of the second analog switch is connected to one end of the third capacitor and one end of the fifth resistor through the fourth resistor, the other end of the fifth resistor is connected to the non-inverting input of the second operational amplifier, and the inverting input of the second operational amplifier is connected to the output terminal of the second operational amplifier, the inverting input of the first operational amplifier, and the change judgment module through the sixth resistor.

5. The integrated circuit voltage detection circuit according to claim 4, characterized in that, The change judgment module includes a first comparator, a second comparator, a first diode, a second diode, a first switching transistor, a first indicator light, and a seventh resistor; The non-inverting input of the first comparator is connected to the inverting input of the second comparator and the output of the second operational amplifier. The inverting input of the first comparator is connected to the non-inverting input of the second comparator and the OUT terminal of the first analog switch. The output of the first comparator is connected to the anode of the first diode. The output of the second comparator is connected to the anode of the second diode. The cathode of the second diode is connected to the cathode of the first diode and the base of the first switching transistor. The emitter of the first switching transistor is grounded. The collector of the first switching transistor is connected to the cathode of the first indicator light. The anode of the first indicator light is connected to the moving terminal of the first push-button switch through a seventh resistor.

6. The integrated circuit voltage detection circuit according to claim 4, characterized in that, The timing control module includes a third diode, an eighth resistor, a fourth capacitor, a first timer, and a fifth capacitor; The cathode of the third diode is connected to the moving terminal of the first push-button switch, the fourth and eighth terminals of the first timer, and the anode of the third diode, one end of the fourth capacitor, the sixth and second terminals of the first timer, through the eighth resistor. The fifth terminal of the first timer is connected to the other end of the fourth capacitor, the first terminal of the first timer, and the ground terminal through the fifth capacitor. The third terminal of the first timer is connected to the CTRL terminal of the second analog switch.

Images