Method and device for eliminating signal noise

A technology for eliminating signals and glitches, applied in the field of signal processing, can solve problems such as complex implementation, many delay series, and prolongation of signals without glitches, and achieve the effects of simple implementation, improved reliability, and reduced difficulty

Active Publication Date: 2009-10-28
ZTE CORP
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Problems solved by technology

[0004] The disadvantage of this method is: in the process of implementation, if you want to eliminate wide glitches, too many delay stages will be added, the delay in outputting glitch-free signals will be longer, and the implementation is more complicated

Method used

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  • Method and device for eliminating signal noise

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specific Embodiment

[0040] In this embodiment, what the up-down counter adopts is a typical four-bit BCD code up-down counter, and its internal structure is as follows image 3 As shown, it includes four signal input terminals (IoutputA, Ioutput B, IoutputC, Ioutput D) and four count value output terminals (OutputA, Output B, Output C, OutputD); among them, the input terminal input is the burr to be eliminated The level value of the signal (the input is binary 0001b when the level is valid, and the input is binary 0000b when the level is invalid), and the output of the output terminal is the binary count value)

[0041] Accordingly, the structure of the signal output circuit is as Figure 4 As shown, it is composed of a four-input AND gate, a four-input NOR gate and a JK flip-flop, and the count value output (Output A, Output B, Output C, Output D) of the four-bit BCD code addition and subtraction counter is used as the four-input The inputs of the AND gate and the four-input NOR gate, while the...

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Abstract

The invention discloses a method and device for eliminating signal noise, the device includes a backward-forward counter and a signal output circuit; the method for eliminating signal noise has the following steps: 1) setting valid and invalid level counting thresholds; 2) receiving the signal with signal noise needed to be eliminated by the backward-forward counter and beginning to count; when the rising edge of each clock arrives, if the signal is an valid electrical level, adding one on the current counting value, otherwise subtracting one; and the counting value does not increase/decrease until it reaches to a valid/invalid level counting threshold; meanwhile, the signal output circuit outputs signal without noise according to the counting value: when the rising edge of each clock arrives, if the counting value is a valid/invalid level counting threshold, then outputting valid/invalid level; if the counting value is between the valid and invalid level counting threshold, keeping the output equal to the output of the previous clock. The device provided by the invention can thoroughly eliminate wide noise, stably output signal without noise, and which is simple to be realized, thereby improving reliability of the system.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and device for eliminating signal burrs. Background technique [0002] With the development of data communication technology, the complex design of communication equipment emerges in an endless stream, which makes the signal more and more susceptible to interference and glitches. The so-called glitch is the sharp angle or sharp point in the smooth signal. How to eliminate burrs has become the most common problem in the field of signal processing technology. [0003] Chinese patent CN200610160922 discloses a device and method for eliminating signal burrs, the core idea of ​​which is: determine the delay series according to the maximum width of the burr to be eliminated, and perform delay processing on the interface signal to be deburred according to the delay series; Logical AND operation and logical OR operation are respectively performed on the processed del...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K5/00H03K5/125H03K19/0175
Inventor 刘一远
Owner ZTE CORP
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