JPS60172454U

JPS60172454U - Light receiving circuit device

Info

Publication number: JPS60172454U
Application number: JP1984060315U
Authority: JP
Inventors: 阿久津　昇
Original assignee: 日本電気株式会社
Priority date: 1984-04-24
Filing date: 1984-04-24
Publication date: 1985-11-15

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のリモートコントロールシステムの一例を
示したブロック図、第２図は本考案の一実施例によるリ
モートコントロールシステムを示したブロック図、第３
図ａ〜ｅはそれぞれ本考案の受光回路の各部の電圧波形
を示す波形図である。１・・・リモートコントロール送信ＩＣ，２・・・発光
ダイオード駆動トランジスタ、３・・・電流制限抵抗、
４・・・赤外発光ダイオード、５・・・ピンホトダイオ
ード、６・・・プリアンプ、７・・・ＯＲゲート、ａ・
・・蛍光灯の影響が少ない所でのピンホトダイオード出
力波形、ｂ・・・蛍光灯の影響が多い所でのピンホトダ
イオード出力波形、Ｃ・・・ａに対応したプリアンプ出
力波形、ｄ・・・ｂに対応したプリアンプの出力波形、
ｅ・・・ＯＲゲートの出力波形。、　　　・ヂFig. 1 is a block diagram showing an example of a conventional remote control system, Fig. 2 is a block diagram showing a remote control system according to an embodiment of the present invention, and Fig. 3 is a block diagram showing an example of a conventional remote control system.
Figures a to e are waveform diagrams showing voltage waveforms at various parts of the light receiving circuit of the present invention, respectively. 1... Remote control transmission IC, 2... Light emitting diode drive transistor, 3... Current limiting resistor,
4... Infrared light emitting diode, 5... Pin photodiode, 6... Preamplifier, 7... OR gate, a.
・・Pin photodiode output waveform in a place where there is little influence from fluorescent lights, b...Pin photodiode output waveform in a place where there is a lot of influence from fluorescent lights, C...Preamplifier output waveform corresponding to a, d... The output waveform of the preamplifier corresponding to b,
e...OR gate output waveform. , ・も

Claims

[Scope of utility model registration request]

A light-receiving circuit device characterized in that a transmitted optical signal is received by two light-receiving elements, the output signals thereof are input to a gate circuit, and an in-phase output signal is outputted as a received optical signal with respect to the transmitted optical signal.