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JPS5564452A - Photo receiver circuit - Google Patents

Photo receiver circuit

Info

Publication number
JPS5564452A
JPS5564452A JP13770778A JP13770778A JPS5564452A JP S5564452 A JPS5564452 A JP S5564452A JP 13770778 A JP13770778 A JP 13770778A JP 13770778 A JP13770778 A JP 13770778A JP S5564452 A JPS5564452 A JP S5564452A
Authority
JP
Japan
Prior art keywords
amplifier
converter
resistance
bias
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
JP13770778A
Other languages
Japanese (ja)
Inventor
Akira Miyauchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13770778A priority Critical patent/JPS5564452A/en
Publication of JPS5564452A publication Critical patent/JPS5564452A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/691—Arrangements for optimizing the photodetector in the receiver
    • H04B10/6911—Photodiode bias control, e.g. for compensating temperature variations

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To prevent the runaway and oscillations of an AGC loop system by limiting a bias current by inserting a resistance into the bias supply circuit of a DC/DC converter which supplies a bias voltage to an avalanche photo diode. CONSTITUTION:This photo receiver circuit consists of DC/DC converter 5 which applies a bias voltage to avalanche photo diode APD1, amplifier 2 which amplifies the output of APD1, and peak detector 3 which detects the peak value of the output of this amplifier 2. Further, operational amplifier 4 is provided which compares the peak value detected by detector 3 with reference voltage Ref and then applies this comparison output as a control voltage to the input of converter 5. Resistance R is inserted into the bias supply circuit of converter 5 of this constitution and a voltage across this resistance R is fed back to amplifier 4 by way of amplifier 6 and non-linear response circuit 7 to limit a current flowing through APD by way of resistance R, thereby preventing the runaway and oscillations of loop 2.
JP13770778A 1978-11-08 1978-11-08 Photo receiver circuit Pending JPS5564452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13770778A JPS5564452A (en) 1978-11-08 1978-11-08 Photo receiver circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13770778A JPS5564452A (en) 1978-11-08 1978-11-08 Photo receiver circuit

Publications (1)

Publication Number Publication Date
JPS5564452A true JPS5564452A (en) 1980-05-15

Family

ID=15204934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13770778A Pending JPS5564452A (en) 1978-11-08 1978-11-08 Photo receiver circuit

Country Status (1)

Country Link
JP (1) JPS5564452A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5757049A (en) * 1980-09-22 1982-04-06 Fujitsu Ltd Light agc system
FR2563066A1 (en) * 1984-04-12 1985-10-18 Ericsson Telefon Ab L M DEVICE FOR INCREASING THE DYNAMICS OF AN INTEGRATING OPTOELECTRIC RECEIVER
GB2400505A (en) * 2003-04-03 2004-10-13 Texas Instruments Ltd Photo detector protected bias circuit
JP2006086737A (en) * 2004-09-15 2006-03-30 Sumitomo Electric Ind Ltd Bias control circuit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5757049A (en) * 1980-09-22 1982-04-06 Fujitsu Ltd Light agc system
JPH0145255B2 (en) * 1980-09-22 1989-10-03 Fujitsu Ltd
FR2563066A1 (en) * 1984-04-12 1985-10-18 Ericsson Telefon Ab L M DEVICE FOR INCREASING THE DYNAMICS OF AN INTEGRATING OPTOELECTRIC RECEIVER
WO1985004773A1 (en) * 1984-04-12 1985-10-24 Telefonaktiebolaget Lm Ericsson Apparatus for increasing the dynamic range in an integrating optoelectric receiver
GB2400505A (en) * 2003-04-03 2004-10-13 Texas Instruments Ltd Photo detector protected bias circuit
GB2400505B (en) * 2003-04-03 2006-08-30 Texas Instruments Ltd Improvements in or relating to photodetection
JP2006086737A (en) * 2004-09-15 2006-03-30 Sumitomo Electric Ind Ltd Bias control circuit
JP4501612B2 (en) * 2004-09-15 2010-07-14 住友電気工業株式会社 Bias control circuit

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