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Narrow pulse filtering method

A filtering method and narrow pulse technology, applied in pulse processing, pulse technology, electrical components, etc., can solve problems such as the impact of narrow pulse filtering

Active Publication Date: 2016-09-21
西安星辰同创科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the algorithm is processed after sampling by the MCU, the MCU itself is easily affected by various interferences, which affects the filtering of narrow pulses

Method used

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Experimental program
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Embodiment 4

[0041] In Embodiment 4, the signal selection circuit T51 is a two-to-one data selector, and the two data input signals and output signals are in-phase, and the Schmidt circuit F51 and Schmidt circuit F61 are in-phase Schmidt circuits respectively. Therefore, the output of the signal selection circuit T51 and the input signal of the positive narrow pulse filter circuit are in-phase, and the output of the signal selection circuit T51 and the input signal of the negative narrow pulse filter circuit are also in the same phase. related relationship. The function of the signal selection circuit T51 is: when the control terminal A=0 is selected, output Y=D1; when the control terminal A=1 is selected, output Y=D2. The output terminal Y (that is, the pulse output terminal P2) of the signal selection circuit T51 is directly connected to the selection control terminal A of the signal selection circuit T51, and when the output pulse P2 is at a low level, the control signal selection circu...

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Abstract

The invention discloses a narrow pulse filtering method. The method is implemented by a narrow pulse filtering device comprising a positive narrow pulse filtering circuit, a negative narrow pulse filtering circuit and a signal selecting circuit. Through the adoption of the device, an output pulse controls and gates one of the positive narrow pulse filtering circuit and the negative narrow pulse filtering circuit as the output pulse through the signal selecting circuit, the positive narrow pulse interference in the negative wide pulse period and the negative narrow pulse interference in the positive wide pulse period can be automatically filtered, in particular, the continuous narrow pulse interference signal can be filtered; the maximum width of each of the positive narrow pulse and the negative narrow pulse needing to filter can be adjusted through the changing of the slow charging time or slow discharging time of a capacitor. The method can be applied to all occasions needing to filter the narrow pulse interference signals a digital signal circuit.

Description

technical field [0001] The invention relates to a pulse signal processing method, in particular to a narrow pulse filtering method. Background technique [0002] In digital signal circuits, it is often necessary to filter the positive narrow pulse and negative narrow pulse in the pulse signal, for example, filter a single narrow interference pulse, filter the shaking pulse of the mechanical tri-state gate, and so on. At present, the commonly used method is to use a filter circuit for filtering, or use an MCU to sample and perform algorithm processing. Filtering circuit is used to filter. When the frequency of the narrow pulse to be filtered is high, the filter circuit has a DC memory effect, and the previous narrow pulse will affect the filtering of the latter narrow pulse. When the algorithm is processed after sampling by the MCU, the MCU itself is easily affected by various interferences, which will affect the filtering of narrow pulses. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): H03K5/1252
CPCH03K5/1252
Inventor 凌云孔玲爽肖会芹
Owner 西安星辰同创科技有限公司
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