JPS6035633U - variable gain circuit - Google Patents

variable gain circuit

Info

Publication number
JPS6035633U
JPS6035633U JP1983126898U JP12689883U JPS6035633U JP S6035633 U JPS6035633 U JP S6035633U JP 1983126898 U JP1983126898 U JP 1983126898U JP 12689883 U JP12689883 U JP 12689883U JP S6035633 U JPS6035633 U JP S6035633U
Authority
JP
Japan
Prior art keywords
variable gain
gain circuit
variable
resistance
resistor
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
JP1983126898U
Other languages
Japanese (ja)
Inventor
林　宗男
大司郎 沖原
Original Assignee
ソニー株式会社
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 by ソニー株式会社 filed Critical ソニー株式会社
Priority to JP1983126898U priority Critical patent/JPS6035633U/en
Publication of JPS6035633U publication Critical patent/JPS6035633U/en
Pending legal-status Critical Current

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  • Optical Communication System (AREA)

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 drawings]

第１図は従来より光通信装置における電気的な信号伝送
系に用いられる利得可変回路の回路図である。第２図お
よび第３図は上記従来の利得可変回路に用いられる固定
抵抗が可変抵抗の最小値に比べ小さい場合のアッテネー
タ特性および大きい場合のアッテネータ特性をそれぞれ
示すグラフである。第４図は本考案に係る利得可変回路
の一実施例を示す回路図である。第５図は上記実施例の
アッテネータ特性を示すグラフである。第６図は本考案
に係る利得可変回路の別の実施例を示す回路図である。 １１・・・入力端子、１２・・・固定抵抗、１３・・・
光電可変抵抗、１６・・・浮遊容量、１７・・・コイル
、１８・・・可変抵抗、１９・・・出力端子、２０・・
・電界効果トランジスタ。 第３図 第４図FIG. 1 is a circuit diagram of a variable gain circuit conventionally used in an electrical signal transmission system in an optical communication device. FIGS. 2 and 3 are graphs showing attenuator characteristics when the fixed resistance used in the conventional variable gain circuit is smaller than the minimum value of the variable resistance, and attenuator characteristics when it is larger than the minimum value of the variable resistance, respectively. FIG. 4 is a circuit diagram showing an embodiment of the variable gain circuit according to the present invention. FIG. 5 is a graph showing the attenuator characteristics of the above embodiment. FIG. 6 is a circuit diagram showing another embodiment of the variable gain circuit according to the present invention. 11...Input terminal, 12...Fixed resistance, 13...
Photoelectric variable resistor, 16... Stray capacitance, 17... Coil, 18... Variable resistor, 19... Output terminal, 20...
・Field effect transistor. Figure 3 Figure 4

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 光通信装置の電気的な信号伝送系において、入力端子に
供給される入力信号を固定抵抗と抵抗可変手段により制
御し出力するようになした利得可変手段を有し、その出
力側に生ずる浮遊容量と並列に共振用のコイルと抵抗の
直列回路を接続したことを特徴とする利得可変回路。In an electrical signal transmission system of an optical communication device, there is a variable gain means that controls and outputs an input signal supplied to an input terminal using a fixed resistance and a variable resistance means, and stray capacitance generated on the output side of the variable gain means is used. A variable gain circuit characterized by connecting a series circuit of a resonant coil and a resistor in parallel.
JP1983126898U 1983-08-18 1983-08-18 variable gain circuit Pending JPS6035633U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1983126898U JPS6035633U (en) 1983-08-18 1983-08-18 variable gain circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1983126898U JPS6035633U (en) 1983-08-18 1983-08-18 variable gain circuit

Publications (1)

Publication Number Publication Date
JPS6035633U true JPS6035633U (en) 1985-03-12

Family

ID=30288392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1983126898U Pending JPS6035633U (en) 1983-08-18 1983-08-18 variable gain circuit

Country Status (1)

Country Link
JP (1) JPS6035633U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0758700A (en) * 1993-08-12 1995-03-03 Oki Electric Ind Co Ltd Optical transmission loss compensation circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0758700A (en) * 1993-08-12 1995-03-03 Oki Electric Ind Co Ltd Optical transmission loss compensation circuit

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