Power-on reset circuit for semiconductor integrated circuits

An integrated circuit and electric reset technology, which is applied in the direction of improving the reliability of logic circuits, bipolar transistors, and reducing the power of field effect transistors, etc., to improve reliability, realize power-off detection, power-on reset, and reliable power-on The effect of reset

Active Publication Date: 2021-02-09
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 achieve both low power consumption and high reliability

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by 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 "including" and variations thereof mean open-ended inclusion, ie, "including but not limited to". The term "or" means "and / or" unless specifically stated otherwise. 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 additional embodiment." The terms "first", "seco...

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PUM

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Abstract

The embodiment relates to a power-on reset circuit for a semiconductor integrated circuit, including: a power supply voltage detection module, configured to detect the power supply voltage and output a first indication signal, the first indication signal indicating the level of the power supply voltage; a current bias module, coupled To the power supply voltage detection module and including: a first current source, used to output the first reference current; a resistance setting unit, used to set the bias resistance of the first current source based on the first indication signal, so that the bias resistance and the power supply The voltage is matched; the threshold setting and detection module is coupled to the current bias module and includes: a threshold setting unit, configured to set a plurality of voltage thresholds based on the first reference current, and when the power supply voltage is greater than the plurality of voltage thresholds When the maximum value of , the second indication signal is output; the filtering and shaping unit is used for filtering and shaping the second indication signal to generate a power-on reset signal. In this way, a power-on reset circuit with low power consumption and high reliability is provided.

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 semiconductor integrated circuits. Background technique [0002] In the integrated circuit system, the digital circuit has only two level states of low level and high level when it is working normally, which belongs to the discrete system. The power input supplied is an analog circuit, which is a continuous linear system. It usually takes several milliseconds to ten milliseconds for the voltage between the VDD and VSS of the chip to reach the voltage that the digital circuit can work normally. [0003] If the supply voltage is low, it will cause the logic of the circuit output to be indeterminate. In addition, it also 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 becomes stable. [0004] There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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