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A Method of Filtering Glitch Based on Synchronous Circuit

A synchronous circuit and filtering technology, applied in pulse shaping and other directions, can solve the problems of difficult to achieve logic synthesis

Active Publication Date: 2015-10-28
西安翔腾微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the frequency of the sampling clock is too high, logic synthesis is difficult to achieve

Method used

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  • A Method of Filtering Glitch Based on Synchronous Circuit
  • A Method of Filtering Glitch Based on Synchronous Circuit
  • A Method of Filtering Glitch Based on Synchronous Circuit

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Embodiment Construction

[0021] The invention provides a method for filtering burrs based on a synchronous circuit, the method comprising the following steps:

[0022] 1) Use the rising edge and falling edge of the low sampling clock to sample the input signal respectively, and obtain the rising edge sampling signal and the falling edge sampling signal;

[0023] 2) Reshape the rising edge sampling signal and the falling edge sampling signal to obtain the shaped rising edge sampling signal and the shaped falling edge sampling signal;

[0024] 2.1) Put the rising edge sampling signal acquired by the rising edge and the falling edge sampling signal acquired by the falling edge into the 4-bit shift register respectively;

[0025] 2.2) According to the value in the 4-bit shift register, judge the rising edge sampling signal and the falling edge sampling signal respectively, and output the shaped rising edge sampling signal and the shaped falling edge sampling signal:

[0026] If at least 3 of the sampling...

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Abstract

The invention relates to a bur filtering method based on a synchronous circuit. The method includes the steps of step 1, the rising edge and the falling edge of a low-power sampling clock are used for sampling input signals respectively to obtain rising edge sampling signals and falling edge sampling signals, step 2, shaping the rising edge sampling signals and the falling edge sampling signals to obtain shaped rising edge sampling signals and shaped falling edge sampling signals, and step 3, combining the shaped rising edge sampling signals and the shaped falling edge sampling signals to output shaping signals with burrs filtered. The bur filtering method based on the synchronous circuit can filter the burrs on the input signals through the low-power sampling clock and achieve the purpose of filtering and shaping the input signals.

Description

technical field [0001] The invention belongs to the technical field of computer control, and relates to a method for obtaining burrs from a filtering circuit, in particular to a method for filtering burrs based on a synchronous circuit. Background technique [0002] In the circuit design process, the filtering and shaping of the input signal are usually implemented by analog circuits. In a digital circuit, if it is necessary to filter out a burr with a certain width on the input signal, you can select a suitable sampling clock to sample the input signal according to the width of the burr, so as to distinguish the burr on the signal and realize filtering and shaping of the input signal . Usually, the designer's selection of the sampling clock will take into account the ability to distinguish the glitch on the signal. For example, the minimum width of the input signal is 16.67ns, and there is a glitch with a width of 6.0ns on the signal. The designer may choose to sample A c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/01
Inventor 许宏杰马宁郭亮田泽刘宁宁杨峰淮治华
Owner 西安翔腾微电子科技有限公司
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