JPS5577218A - Driver circuit - Google Patents

Driver circuit

Info

Publication number
JPS5577218A
JPS5577218A JP15181178A JP15181178A JPS5577218A JP S5577218 A JPS5577218 A JP S5577218A JP 15181178 A JP15181178 A JP 15181178A JP 15181178 A JP15181178 A JP 15181178A JP S5577218 A JPS5577218 A JP S5577218A
Authority
JP
Japan
Prior art keywords
trq2
load
amplifier
driver circuit
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
JP15181178A
Other languages
Japanese (ja)
Inventor
Yoshikazu Yokomizo
Katsumi Murakami
Kyoshi Furuichi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP15181178A priority Critical patent/JPS5577218A/en
Publication of JPS5577218A publication Critical patent/JPS5577218A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude without controlling loop

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

PURPOSE:To make it possible to obtain a driver circuit which provides stable control over a load by setting an input voltage to a control transistor to a fixed value by a circuit with a diode, LED and operational amplifier by way of a resistor. CONSTITUTION:In accordance with the output of amplifier Q1 amplifying an input signal, control element TrQ2 controls a driving voltage for a load and a negative feedback amplifier circuit is formed of amplifier Q1, resistance R1, TrQ2, and resistance R2. To set the driving voltage for the load above or below a fixed voltage, operational amplifier Q4 sets an input voltage to TrQ2 to a fixed value when the output of TrQ2 becomes higher or lower than a fixed level. Consequently, a driver circuit can be obtained which exercises stable control over the load.
JP15181178A 1978-12-07 1978-12-07 Driver circuit Pending JPS5577218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15181178A JPS5577218A (en) 1978-12-07 1978-12-07 Driver circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15181178A JPS5577218A (en) 1978-12-07 1978-12-07 Driver circuit

Publications (1)

Publication Number Publication Date
JPS5577218A true JPS5577218A (en) 1980-06-10

Family

ID=15526816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15181178A Pending JPS5577218A (en) 1978-12-07 1978-12-07 Driver circuit

Country Status (1)

Country Link
JP (1) JPS5577218A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006080871A (en) * 2004-09-09 2006-03-23 Nippon Antenna Co Ltd Over input protection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006080871A (en) * 2004-09-09 2006-03-23 Nippon Antenna Co Ltd Over input protection circuit

Similar Documents

Publication Publication Date Title
JPS55115383A (en) Bias circuit for laser diode
JPS5457943A (en) Schmitt trigger circuit
JPS57103522A (en) Power supply device
JPS6451703A (en) Oscillation circuit
JPS574610A (en) Automatic gain controlling circuit
JPS57143143A (en) Air-to-fuel ratio control device
JPS5447471A (en) Electronic circuit
SU800973A1 (en) Dc voltage stabilizer
JPS5445770A (en) Stabilized power supply
SU1589381A1 (en) Amplifyer with electronic control of gain
JPS5511640A (en) Power amplifier
JPS5713810A (en) Monostable multivibrator
JPS576915A (en) Constant voltage stabilizer
GB940672A (en) Improvements in transistor circuits
JPS5597729A (en) Schmitt circuit
JPS5668010A (en) Power amplifier
JPS55137716A (en) Level shift circuit
JPS555559A (en) Integrated circuit
JPS56115577A (en) Photodetecting circuit
JPS5755605A (en) Differential amplifier
JPS56114436A (en) Power transistor driving circuit
JPS5668807A (en) Temperature control device
JPS57207448A (en) Automatic controlling circuit for multiplication factor of avalanche photo diode
JPS57208716A (en) Gain controlling circuit
JPS5483744A (en) Transistor limiter circuit