Power supply voltage electrification detection circuit and achieving method for electrification detection

Abstract

The invention provides a power supply voltage electrification detection circuit and an achieving method for electrification detection. The power supply voltage electrification detection circuit at least comprises a power supply voltage detection circuit, a voltage comparator circuit and a level conversion circuit, wherein the voltage comparator circuit is connected with the power supply voltage detection circuit; the level conversion circuit is connected with the voltage comparator circuit. By adopting the power supply voltage electrification detection circuit provided by the invention, shaking and turnover phenomena of output voltage are avoided, and meanwhile the driving property of circuit output voltage is effectively improved; the power supply voltage electrification detection circuit is small in threshold variation along with temperature and has the characteristics of high precision and low temperature coefficient; the structure is simple, the power consumption is small, the complexity of a conventional circuit is effectively reduced, and the power consumption of the circuit is reduced. The achieving method of electrification detection on power supply voltage electrification detection circuit is simple and rapid in electrification speed detection, the detection efficiency is effectively improved, and meanwhile, the problem that the precision is low as the threshed voltage of the power supply voltage electrification detection circuit can be solved.

Description

technical field [0001] The invention relates to the technical field of analog integrated circuits, in particular to a power supply voltage power-on detection circuit and a method for realizing power-on detection thereof. Background technique [0002] The power supply voltage power-on detection circuit is widely used in integrated circuit systems. Its main function is to detect whether the system power supply voltage is higher than a threshold voltage when it is powered on, and to provide a power-on set signal for other circuits. Before the system power supply voltage rises to the threshold voltage, this power-on set signal makes other circuits in the system in a fixed initialization state, and there will be no error state caused by too low power supply voltage; when the system power supply voltage rises to the threshold voltage Later, the state of the power-on set signal provided by the power-on detection circuit changes, so that other circuits in the system can start to wor...

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a power supply voltage power-on detection circuit and its implementation method for detecting power-on, which is used to solve the threshold voltage of the power supply voltage power-on detection circuit in the prior art. Low precision or complex circuit structure, high power consumption, and limited application range

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