JPS5877928U

JPS5877928U - Digital input noise removal circuit

Info

Publication number: JPS5877928U
Application number: JP17207281U
Authority: JP
Inventors: 黒木　邦彦
Original assignee: 株式会社日立製作所
Priority date: 1981-11-20
Filing date: 1981-11-20
Publication date: 1983-05-26

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示すブロック図、第２図は
第１図の各部のタイムスケジュール図である。１・・・・・・入力端、２・・・・・・遅延回路、３・
・曲ワンショット回路、４・・・・・・論理積回路、５
・・・・・・出力端、・　６・・・・・・ディジタル入
力信号、７・・・・・・２の出力信号、８・・・・・・
３の出力信号、９・・・・・・４の出力信号、ＴＳ・・
・・・・正常信号のパルス巾、ＴＮ・・曲雑音のパルス
巾、ＴＤ・・・・・・遅延回路の遅延時間、Ｔｏ・・・
・・・ワンショット回路の否定出力パルス巾、Ｔｄ・・
・・・・ワンショット回路の応答時間、Ａ・・曲正常信
号入力時、−Ｂ・・・・・・誘導等の雑音入力時、Ｃ・
・曲チャタリング等の雑音入力時。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a time schedule diagram of each part of FIG. 1. 1...Input terminal, 2...Delay circuit, 3.
・Song one-shot circuit, 4...AND circuit, 5
...Output end, 6...Digital input signal, 7...Output signal of 2, 8...
3 output signal, 9...4 output signal, TS...
...Pulse width of normal signal, TN...Pulse width of music noise, TD...Delay time of delay circuit, To...
...Negation output pulse width of one-shot circuit, Td...
...Response time of one-shot circuit, A...When a normal song signal is input, -B......When noise such as induction is input, C.
・When inputting noise such as song chattering.

Claims

[Scope of utility model registration request]

In a digital input circuit that receives digital output signals such as relay contact outputs, transistor outputs, and outputs of digital integrated circuits, there is a delay circuit that receives the various output signals as input, and a delay circuit that receives the various output signals as input, and a front end of this signal. What is claimed is: 1. A digital input noise removal circuit comprising: a one-shot circuit operating at 100 nm; and an AND circuit inputting an output signal of a delay circuit and a negative output signal of the one-shot circuit.