JPS58169751U - optical receiver circuit - Google Patents

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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の光受信回路のブロック図、第２−はその
具体回路図、第３図はその各部の波形図、′第４図はこ
の考案の一実施例の回路図、第５図はその各部の波形図
、第６図は光入力に対する各電圧の特性図である。 ＰＤ・・・ホトダイオード、ＯＰ□、ＯＦ２・・・演算
増幅器、ＣＯＭＰ・・・コンパレータ、Ｒ３＋　　Ｒ’
　３・・・抵抗、Ｒ４・・・抵抗、Ｃ・・・コンデンサ
。Figure 1 is a block diagram of a conventional optical receiver circuit, Figure 2 is a specific circuit diagram thereof, Figure 3 is a waveform diagram of each part thereof, Figure 4 is a circuit diagram of an embodiment of this invention, Figure 5 6 is a waveform diagram of each part, and FIG. 6 is a characteristic diagram of each voltage with respect to optical input. PD...Photodiode, OP□, OF2...Operation amplifier, COMP...Comparator, R3+R'
3...Resistor, R4...Resistor, C...Capacitor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 受光素子と、この受光素子の出力を増幅する増幅器と、
この増幅器の出力を＋に分圧する分圧抵抗と、この分圧
抵抗に↓る分圧電圧のピーク値を検出して保持するピー
ク検出回路と、前記増幅器の出力を前記ピーク検出回路
の出力と比較するコンパレータとを備えた光受信回路。a light-receiving element; an amplifier that amplifies the output of the light-receiving element;
A voltage dividing resistor that divides the output of this amplifier into +, a peak detection circuit that detects and holds the peak value of the divided voltage applied to this voltage dividing resistor, and a peak detection circuit that converts the output of the amplifier into the output of the peak detection circuit. An optical receiving circuit equipped with a comparator for comparison.