Power-on reset circuit for semiconductor integrated circuit

An integrated circuit, power reset technology, applied in the direction of logic circuit, field effect transistor power reduction, bipolar transistor reliability improvement, etc., to improve reliability, realize power-down detection, power-on reset, and reliable power-on effect of reset

Active Publication Date: 2020-12-11
HANGZHOU SDIC MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing reset circuit is difficult to a

Method used

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  • Power-on reset circuit for semiconductor integrated circuit
  • Power-on reset circuit for semiconductor integrated circuit
  • Power-on reset circuit for semiconductor integrated circuit

Examples

Experimental program
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Embodiment Construction

[0028] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0029] As used herein, the term "comprise" and its variants mean open inclusion, ie "including but not limited to". The term "or" means "and / or" unless otherwise stated. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one further embodiment". The terms "first", "second", etc. may refer to diff...

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PUM

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Abstract

An embodiment relates to a power-on reset circuit for a semiconductor integrated circuit, comprising: a power supply voltage detection module for detecting a power supply voltage and outputting a first indication signal indicating a magnitude of the power supply voltage; a current bias module coupled to the power supply voltage detection module and including: a first current source for outputtinga first reference current, and a resistance setting unit which is used for setting the bias resistance of the first current source based on the first indication signal, so that the bias resistance ismatched with the power supply voltage; a threshold value setting and detecting module which is coupled to the current bias module and comprises: a threshold value setting unit, the threshold value setting unit being used for setting a plurality of voltage threshold values based on the first reference current and outputting a second indication signal when the power supply voltage is greater than the maximum value of the plurality of voltage threshold values, and a filtering and shaping unit which is used for filtering and shaping the second indication signal so as to generate a power-on reset signal of the power supply. In this way, the power-on reset circuit of the power supply is low in power consumption and high in reliability.

Description

technical field [0001] The present disclosure generally relates to the field of semiconductor integrated circuits, and more particularly, to a power-on reset circuit for a semiconductor integrated circuit. Background technique [0002] In the integrated circuit system, when the digital circuit works normally, there are only two level states of low level and high level, which belong to the discrete system. The power supply input is an analog circuit, which belongs to a continuous linear system. It usually takes several milliseconds to ten milliseconds for the voltage between VDD and VSS of the chip to reach the voltage at which the digital circuit can work normally. [0003] If the power supply voltage is low, it will cause the logic of the circuit output to be indeterminate. In addition, it takes time from power-on to the normal start-up of the clock circuit. The clock circuit cannot output the clock signal normally until the power supply voltage is stabilized. [0004] ...

Claims

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Application Information

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IPC IPC(8): H03K19/003H03K19/00
CPCH03K19/0008H03K19/001H03K19/0013H03K19/003H03K19/00307H03K19/00315
Inventor 陈建章
Owner HANGZHOU SDIC MICROELECTRONICS
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