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JPS6436131A - Automatic gain control system for optical receiver - Google Patents

Automatic gain control system for optical receiver

Info

Publication number
JPS6436131A
JPS6436131A JP62190267A JP19026787A JPS6436131A JP S6436131 A JPS6436131 A JP S6436131A JP 62190267 A JP62190267 A JP 62190267A JP 19026787 A JP19026787 A JP 19026787A JP S6436131 A JPS6436131 A JP S6436131A
Authority
JP
Japan
Prior art keywords
apd
frequency characteristic
gain
multiplication factor
voltage
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
JP62190267A
Other languages
Japanese (ja)
Inventor
Shunichi Itabashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Miyagi Ltd
Original Assignee
NEC Miyagi Ltd
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 NEC Miyagi Ltd filed Critical NEC Miyagi Ltd
Priority to JP62190267A priority Critical patent/JPS6436131A/en
Publication of JPS6436131A publication Critical patent/JPS6436131A/en
Pending legal-status Critical Current

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  • Optical Communication System (AREA)

Abstract

PURPOSE:To widen the dynamic range of an automatic gain control circuit (AGC) by controlling simultaneously the multiplication factor of a photodetector of an optical system and the gain versus frequency characteristic of an electric system. CONSTITUTION:An avalanche photodiode (APD) 2 being a photodetector receives an optical input signal 1 and converts it into an electric signal and its multiplication factor varies with a control voltage from an APD bias circuit 9. The amplitude of an output pulse is detected by a peak detector 7, its control signal drives a voltage variable impedance conversion circuit 8 employing a voltage follower to produce a prescribed control voltage thereby controlling simultaneously a gain frequency characteristic automatic control circuit 4 and the APD bias circuit 9. Since the multiplication factor of the APD 2 and the gain frequency characteristic are controlled simultaneously, the dynamic range of the AGC is widened.
JP62190267A 1987-07-31 1987-07-31 Automatic gain control system for optical receiver Pending JPS6436131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62190267A JPS6436131A (en) 1987-07-31 1987-07-31 Automatic gain control system for optical receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62190267A JPS6436131A (en) 1987-07-31 1987-07-31 Automatic gain control system for optical receiver

Publications (1)

Publication Number Publication Date
JPS6436131A true JPS6436131A (en) 1989-02-07

Family

ID=16255303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62190267A Pending JPS6436131A (en) 1987-07-31 1987-07-31 Automatic gain control system for optical receiver

Country Status (1)

Country Link
JP (1) JPS6436131A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048906A (en) * 1989-06-26 1991-09-17 Oki Electric Industry Co., Ltd. Waveguide type photoswitch with a short coupling region
CN105807828A (en) * 2014-12-29 2016-07-27 信泰光学(深圳)有限公司 Light receiving element driving voltage automatic regulating device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048906A (en) * 1989-06-26 1991-09-17 Oki Electric Industry Co., Ltd. Waveguide type photoswitch with a short coupling region
CN105807828A (en) * 2014-12-29 2016-07-27 信泰光学(深圳)有限公司 Light receiving element driving voltage automatic regulating device and method

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