JPS56169262A - Photoelectric converting circuit - Google Patents

Photoelectric converting circuit

Info

Publication number
JPS56169262A
JPS56169262A JP7324280A JP7324280A JPS56169262A JP S56169262 A JPS56169262 A JP S56169262A JP 7324280 A JP7324280 A JP 7324280A JP 7324280 A JP7324280 A JP 7324280A JP S56169262 A JPS56169262 A JP S56169262A
Authority
JP
Japan
Prior art keywords
amplifier
input terminal
negative
constitution
terminal
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
JP7324280A
Other languages
Japanese (ja)
Inventor
Yuichiro Hamada
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP7324280A priority Critical patent/JPS56169262A/en
Publication of JPS56169262A publication Critical patent/JPS56169262A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
    • H03F3/087—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light with IC amplifier blocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To prevent a photoelectric conversion output from varying by setting the value of the load resistance of a photoelectric converting element to zero apparently. CONSTITUTION:The emitter of a phototransistor TR11 is connected to a negative power supply terminal 12A, and its collector to the negative-side input terminal 13A of an operational amplifier 13. Then, the TR11, when a collector current Ic corresponding to light incident to the base flows, supplies a photoelectric conversion signal to the negative-side input terminal 13A of the amplifier 13. Of this amplifier 13, the input terminal 13A supplied with the signal is connected to an output terminal 15 via a feedback resistance 16. In this constitution, the gain of the amplifier 13 is extremely large and the potential difference between terminals 13A and 13B is extremely small, so input impedance is nearly zero. Therefore, the load impedance of the TR11 is extremely small apparently, so the TR11 operates in an extremely short response time, thus nearly eliminating fluctuations of an output voltage.
JP7324280A 1980-05-31 1980-05-31 Photoelectric converting circuit Pending JPS56169262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7324280A JPS56169262A (en) 1980-05-31 1980-05-31 Photoelectric converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7324280A JPS56169262A (en) 1980-05-31 1980-05-31 Photoelectric converting circuit

Publications (1)

Publication Number Publication Date
JPS56169262A true JPS56169262A (en) 1981-12-25

Family

ID=13512509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7324280A Pending JPS56169262A (en) 1980-05-31 1980-05-31 Photoelectric converting circuit

Country Status (1)

Country Link
JP (1) JPS56169262A (en)

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