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Filter Glitch Circuit

A glitch and circuit technology, applied in logic circuits, multiple input and output pulse circuits, electrical components, etc., can solve the problems of large area occupied by circuits and increased chip hardware overhead

Active Publication Date: 2021-05-18
上海亿存芯半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this application, the rising edge delay circuit and the falling edge delay circuit are combined, but the larger the burr width, the larger the area occupied by the circuit, thus increasing the hardware overhead of the chip

Method used

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Embodiment Construction

[0046] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the present invention belongs. As used herein, "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other el...

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Abstract

The present invention provides a glitch filtering circuit, including a signal change detection module, used to receive an input signal, and then output a control signal according to the input signal; a current generation module is connected to the signal change detection module, used to The control signal determines whether to output a bias voltage; the burr elimination main module is connected to the current generation module for receiving the input signal and the bias voltage, and eliminates the input signal under the control of the bias voltage The burr in the signal, under the control of the bias voltage, eliminates the burr in the input signal, which can greatly save the chip area, and the signal change detection module is used to receive the input signal, and then output the control signal according to the input signal , which can effectively avoid the static power consumption of the current generation module.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a glitch filtering circuit. Background technique [0002] When the integrated circuit is in use, the external input signal may be disturbed, and the disturbed input signal will cause the circuit to produce wrong behavior or get wrong data. [0003] For wide power supply voltage application circuits, the solution to eliminate interference is usually to delay the rising and falling edges of the input signal separately to filter out glitches within a specific width range. Glitch is the error caused by the interference of the input signal Signal. [0004] figure 1 For the rising edge delay circuit in the prior art, refer to figure 1 , M1 is a PMOS tube, M2 is an NMOS tube, M3 is a weak PMOS tube, and the channel width of M4 is much larger than the channel length of the PMOS tube. R is a resistor, and C is a capacitor. Assuming that the input signal IN is initially low,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/22H03K19/094
CPCH03K5/22H03K19/094
Inventor 任建军
Owner 上海亿存芯半导体有限公司