JPS57140053A - Photoelectric converting circuit - Google Patents

Photoelectric converting circuit

Info

Publication number
JPS57140053A
JPS57140053A JP56024803A JP2480381A JPS57140053A JP S57140053 A JPS57140053 A JP S57140053A JP 56024803 A JP56024803 A JP 56024803A JP 2480381 A JP2480381 A JP 2480381A JP S57140053 A JPS57140053 A JP S57140053A
Authority
JP
Japan
Prior art keywords
voltage
output
double base
emitter
trs
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.)
Granted
Application number
JP56024803A
Other languages
Japanese (ja)
Other versions
JPS6022857B2 (en
Inventor
Takashi Shimada
Takahiro Asai
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP56024803A priority Critical patent/JPS6022857B2/en
Publication of JPS57140053A publication Critical patent/JPS57140053A/en
Publication of JPS6022857B2 publication Critical patent/JPS6022857B2/en
Expired 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
    • H04B10/693—Arrangements for optimizing the preamplifier in the receiver
    • H04B10/6933—Offset control of the differential preamplifier

Landscapes

  • Electronic Switches (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To achieve high temperature stability and small sized circuit, by comparing an output of a feedback amplifier, which is the sum of a double base to emitter voltage and an offset voltage, with a double base to emitter voltage as a reference voltage. CONSTITUTION:An output voltage Vout10 of a feed back amplifier consisting of transistors (TRs) Q1-Q4 in which an output bias voltage at no signal taking a photo diode PD output current as an input is the sum between double base to emitter voltage drop VBE and an offset voltage Vp, is inputted to one output of a comparator CM. A voltage of 2VBE produced with TRs Q6, Q7 of diode connection and a resistor RC6 is inputted to another input as a reference voltage VR. Thus, even if the output bias voltage Vout13 of a feedback amplifier is lowered because of temperature change, since control is made so that the reference voltage VR is also lowered in following to it, correct comparison is made and an ouput 12 is obtained.
JP56024803A 1981-02-20 1981-02-20 Photoelectric conversion circuit Expired JPS6022857B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024803A JPS6022857B2 (en) 1981-02-20 1981-02-20 Photoelectric conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024803A JPS6022857B2 (en) 1981-02-20 1981-02-20 Photoelectric conversion circuit

Publications (2)

Publication Number Publication Date
JPS57140053A true JPS57140053A (en) 1982-08-30
JPS6022857B2 JPS6022857B2 (en) 1985-06-04

Family

ID=12148345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024803A Expired JPS6022857B2 (en) 1981-02-20 1981-02-20 Photoelectric conversion circuit

Country Status (1)

Country Link
JP (1) JPS6022857B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61207059U (en) * 1985-06-18 1986-12-27

Also Published As

Publication number Publication date
JPS6022857B2 (en) 1985-06-04

Similar Documents

Publication Publication Date Title
JPS57206107A (en) Current mirror circuit
EP0240618A3 (en) Power buffer circuit
GB782337A (en) Improvements in or relating to circuit arrangements comprising a photo-transistor
JPS57140053A (en) Photoelectric converting circuit
JPS5643808A (en) Signal converting circuit
JPS5672507A (en) Current source circuit
EP0398742A3 (en) Clipping circuit
JPS5728406A (en) Amplifier
JPS5739424A (en) Reference voltage source
JPS57157314A (en) Stabilized power supply circuit
JPS5544266A (en) Rectifying circuit
JPS5780823A (en) Schmitt trigger circuit
JPS57143908A (en) Variable gain amplifying circuit
JPS5654117A (en) Schmitt circuit
ES8101349A1 (en) Television picture display device
JPS6418304A (en) Preamplifier
JPS57142031A (en) Photoelectric conversion circuit
JPS6444110A (en) Amplifier
JPS57155814A (en) Error amplifier
DE3369040D1 (en) Amplifier in which the transistor stages are dc-coupled
JPS5750138A (en) Hysteresis circuit
JPS57194322A (en) Photometric amplifier
JPS55129865A (en) Operational logarithmic circuit
JPS6451813A (en) Output voltage limit circuit
JPS6425603A (en) Amplifier circuit