Device and method for realizing voltage detection
A technology for voltage detection and ground voltage, which is applied in the field of devices for voltage detection, and can solve problems such as entering a high-level or low-level self-locking state
Inactive Publication Date: 2012-08-01
广州市广晟微电子有限公司
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[0006] In view of this, the object of the present invention is to provide a device and method for realizing voltage detection, so as to solve the problem that the power supply voltage detection process may enter a high-level or low-level self-locking state
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[0035] see figure 2 , the device for implementing the present invention includes a voltage detection module 200, an output module 201, a control module 202 and a startup module 203, and the input voltage starts to rise from the ground voltage.
[0036]The voltage detection module 200 is used for detecting the input voltage. When the input voltage rises from the ground voltage to a preset voltage, the output state of the voltage detection module is reversed.
[0037] Output module 201: used to buffer the output of the voltage detection module, and use the buffered output as the output of the device.
[0038] The control module 202 is used for turning on the self-locking switch to lock the output of the output module 201 when it is detected that the output state of the output module 201 is reversed.
[0039] Start-up module 203: When the input voltage has not risen to the preset voltage, form a low-impedance path from the output terminal of the voltage detection module to the ...
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The invention provides a device for realizing voltage detection. The device comprises a voltage detection module, an output module, a control module and a starting module, wherein the voltage detection module is used for detecting an input voltage; when the input voltage is increased to a preset voltage from a ground voltage, the output state of the voltage detection module is transited; the output module is used for buffering the output of the voltage detection module and taking the output after being buffered as the output of the device; the control module is used for starting a self-locking switch to lock the output of the device when the condition of transition of the output state of the device is detected; and the starting module is used for forming a low-impedance path from an output end of the voltage detection module to the input voltage at the initial stage of electrifying, closing the self-locking switch in the control module and starting the voltage detection module, causing the circuit to enter into a normal voltage detection work state and avoiding the condition of entering into high level or low level self-locking condition possibly presenting during the process of voltage detection. The invention also provides a method for realizing voltage detection.
Description
technical field [0001] The invention relates to the detection field of integrated circuits, in particular to a device and method for realizing voltage detection. Background technique [0002] During the power-on process of the electronic system, the power supply voltage rises from the ground voltage to the normal working voltage value, and the circuit in the system needs to start working when the power supply voltage rises to a high enough level. If the circuit enters the working state prematurely, due to The power supply voltage at this time is low, which may cause the circuit to be in the wrong initial state and cause the wrong operation of the whole system. Therefore, a voltage detection circuit is often needed in an electronic system. Its function is to generate a corresponding signal when the power supply voltage rises to a high enough preset value to inform other circuits that the power supply voltage is within the normal operating range at this time, and can Beginnin...
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IPC IPC(8): H03K17/22
Inventor 徐肯张建强
Owner 广州市广晟微电子有限公司