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A power-on signal generating circuit

A technology for generating circuits and electrical signals, applied in the field of circuits, can solve problems such as working circuits not working normally, and achieve the effect of accurate triggering

Active Publication Date: 2020-10-09
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the generation of the power-on signal is not accurate enough, it will cause the working circuit to not work normally

Method used

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  • A power-on signal generating circuit
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  • A power-on signal generating circuit

Examples

Experimental program
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Embodiment Construction

[0023] As mentioned above, in the field of circuits, it is usually necessary to provide a power-on signal for the working circuit after power-on, and the working circuit can determine its working state according to the trigger of the power-on signal, such as reset. If the generation of the power-on signal is not accurate enough, the working circuit will not work normally.

[0024] figure 1 It is a structural schematic diagram of a power-on signal generating circuit. The power-on signal generating circuit responds to the power supply voltage VDD1 to generate the power-on signal POR1 to trigger the working circuit.

[0025] figure 2 yes figure 1 A signal schematic diagram of the power-on signal generation circuit in the middle, specifically showing the relationship between the node Node, the power-on signal POR1 and the power supply voltage VDD1 when the power supply voltage VDD1 slowly rises from 0 to the normal working voltage.

[0026] It can be seen that when the power ...

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PUM

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Abstract

The invention provides a power-up signal generation circuit, comprising: a first voltage generation unit, wherein an input terminal of the first voltage generation unit is connected with a power supply voltage, the first voltage generation unit is used for generating a first voltage signal according to the power supply voltage, and an output terminal of the first voltage generation unit is connected with a discharge node; an output unit, an input terminal of the output unit is connected to the discharge node, an output terminal of the output unit outputs the power-on signal, and when a voltageof the discharge node is greater than a first threshold value, the power-on signal flips; a discharge unit adapted to discharge charge to the discharge node before the power-on signal flips over. Thepower-on signal generating circuit of the invention can generate the power-on signal more accurately.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a power-on signal generating circuit. Background technique [0002] In the circuit field, it is usually necessary to provide a power-on signal for the working circuit after power-on, and the working circuit can determine its working state according to the trigger of the power-on signal, such as reset. The working circuit can be of many kinds, for example, it can be a non-volatile memory (NVM, NonVolatile Memory) circuit. [0003] If the generation of the power-on signal is not accurate enough, the working circuit will not work normally. Contents of the invention [0004] The technical problem solved by the invention is to generate the power-on signal more accurately. [0005] In order to solve the above technical problems, an embodiment of the present invention provides a power-on signal generating circuit, including: a first voltage generating unit, the input terminal of the first vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C5/14G11C7/20
CPCG11C5/148G11C7/20
Inventor 權彞振倪昊刘晓艳
Owner SEMICON MFG INT (SHANGHAI) CORP