JPS61195648U - - Google Patents

Info

Publication number
JPS61195648U
JPS61195648U JP1985080425U JP8042585U JPS61195648U JP S61195648 U JPS61195648 U JP S61195648U JP 1985080425 U JP1985080425 U JP 1985080425U JP 8042585 U JP8042585 U JP 8042585U JP S61195648 U JPS61195648 U JP S61195648U
Authority
JP
Japan
Prior art keywords
circuit
output
preamplifier
input
light receiving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1985080425U
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1985080425U priority Critical patent/JPS61195648U/ja
Publication of JPS61195648U publication Critical patent/JPS61195648U/ja
Pending legal-status Critical Current

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  • Optical Communication System (AREA)

Description

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

第１図は本考案の実施例のブロツク図、第２図
は本考案の他の実施例のブロツク図、第３図は従
来の光受信回路のブロツク図である。 １……アバランシエフオトダイオード又はＰＩ
Ｎフオトダイオード等の受光素子、２……前置増
幅回路、３……帰還抵抗器、４……ピーク検出回
路、５……比較回路、６……トランジスタ、７…
…ダイオード、８，１１……抵抗器、９……前置
増幅回路の出力端子、１０……コンデンサ。 FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional optical receiving circuit. 1...Avalanche photodiode or PI
Light receiving element such as N photodiode, 2... Preamplifier circuit, 3... Feedback resistor, 4... Peak detection circuit, 5... Comparison circuit, 6... Transistor, 7...
...Diode, 8, 11...Resistor, 9...Output terminal of preamplifier circuit, 10...Capacitor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 光信号を電気信号に変換する受光素子と、前記
受光素子の出力を増幅するトランジスタインピー
ダンス形の前置増幅回路と、前記前置増幅回路の
出力のピークを検出するピーク検出回路と、前記
ピーク検出回路の出力と基準電圧とを比較する比
較回路とを含み、前記比較回路の出力に応じて前
記前置増幅回路の入力信号制限する光受信回路に
おいて、前記比較回路の出力を入力とし、コレク
タ抵抗を介して電源に接続されたエミツタ接地ト
ランジスタと、カソードが前記トランジスタのコ
レクタと接続され、アノードが前記前置増幅回路
の入力と接続されたダイオードとを含む光受信回
路。 a light receiving element that converts an optical signal into an electrical signal; a transistor impedance type preamplifier circuit that amplifies the output of the light receiving element; a peak detection circuit that detects the peak of the output of the preamplifier circuit; and the peak detection circuit. An optical receiving circuit includes a comparison circuit that compares the output of the circuit with a reference voltage, and limits the input signal of the preamplifier circuit according to the output of the comparison circuit, the output of the comparison circuit being input, and a collector resistor. and a diode having a cathode connected to the collector of the transistor and an anode connected to the input of the preamplifier circuit.
JP1985080425U 1985-05-29 1985-05-29 Pending JPS61195648U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985080425U JPS61195648U (en) 1985-05-29 1985-05-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985080425U JPS61195648U (en) 1985-05-29 1985-05-29

Publications (1)

Publication Number Publication Date
JPS61195648U true JPS61195648U (en) 1986-12-05

Family

ID=30626260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985080425U Pending JPS61195648U (en) 1985-05-29 1985-05-29

Country Status (1)

Country Link
JP (1) JPS61195648U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08307362A (en) * 1995-05-01 1996-11-22 Nec Corp Photodetector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580936A (en) * 1978-12-14 1980-06-18 Fujitsu Ltd Optical receiving circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580936A (en) * 1978-12-14 1980-06-18 Fujitsu Ltd Optical receiving circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08307362A (en) * 1995-05-01 1996-11-22 Nec Corp Photodetector

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