JPS641014A - Voltage/current converting circuit - Google Patents

Voltage/current converting circuit

Info

Publication number
JPS641014A
JPS641014A JP15545787A JP15545787A JPS641014A JP S641014 A JPS641014 A JP S641014A JP 15545787 A JP15545787 A JP 15545787A JP 15545787 A JP15545787 A JP 15545787A JP S641014 A JPS641014 A JP S641014A
Authority
JP
Japan
Prior art keywords
voltage
resistance
amplifier
ref
supplied
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
JP15545787A
Other languages
Japanese (ja)
Other versions
JPH011014A (en
Inventor
Kunio Seki
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 Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP15545787A priority Critical patent/JPS641014A/en
Publication of JPH011014A publication Critical patent/JPH011014A/en
Publication of JPS641014A publication Critical patent/JPS641014A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE: To drive a load circuit with a constant current by providing a resistance, which detects the current flowing to the load circuit, between the output terminal of a first inverting amplifier to which a control voltage is supplied and the output terminal of a second inverting amplifier to which the output voltage of the first inverting amplifier is supplied and controlling the gain of the first amplifier by the variation of the current.
CONSTITUTION: A control voltage Vctl is supplied to the inverted input terminal of a first inverting amplifier 1 through an input resistance R1, and a reference voltage Vref is set to the non-inverted input terminal through a resistance R3. A resistance R2 is a feedback resistance, and a gain Av of the amplifier 1 is determined in accordance with Av=-R2/R1(Vctl-Vref). An output voltage V01 of the amplifier 1 is supplied to a second inverting amplifier 2 through a resistance Rs, and the gain of the amplifier 2 is determined in accordance with Av=-Rs/R3 (V01-Vref) because R3 is the feedback resistance. In case the voltage Vctl is lower than the voltage Vref, the polarity of an output current I0 is changed to the opposite polarity and a voltage drop Vs determined by I0.Rs is generated between both ends of the current detecting resistance Rs, and the reference voltage of the amplifier 1 is determined by Vref+Vs.
COPYRIGHT: (C)1989,JPO&Japio
JP15545787A 1987-06-24 1987-06-24 Voltage/current converting circuit Pending JPS641014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15545787A JPS641014A (en) 1987-06-24 1987-06-24 Voltage/current converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15545787A JPS641014A (en) 1987-06-24 1987-06-24 Voltage/current converting circuit

Publications (2)

Publication Number Publication Date
JPH011014A JPH011014A (en) 1989-01-05
JPS641014A true JPS641014A (en) 1989-01-05

Family

ID=15606464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15545787A Pending JPS641014A (en) 1987-06-24 1987-06-24 Voltage/current converting circuit

Country Status (1)

Country Link
JP (1) JPS641014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015156599A (en) * 2014-02-21 2015-08-27 ルネサスエレクトロニクス株式会社 drive circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015156599A (en) * 2014-02-21 2015-08-27 ルネサスエレクトロニクス株式会社 drive circuit

Similar Documents

Publication Publication Date Title
JPS57206113A (en) Amplifier for limiter
JPS56168168A (en) Window comparator circuit
EP0240618A3 (en) Power buffer circuit
JPS5718109A (en) Sound volume controlling circuit
JPS57103521A (en) Power supply circuit
JPS641014A (en) Voltage/current converting circuit
JPS56144610A (en) Converting circuit
JPS6465610A (en) Power supply circuit
JPS54156153A (en) Temperature compensating constant voltage circuit
JPS57202108A (en) One terminal type level controlling circuit
JPH0224045B2 (en)
KR900001441Y1 (en) Automatic gain control circuit
JPS57146325A (en) Constant current circuit
JPS57107618A (en) Power amplifier
JPS55103079A (en) Switching regulator
JPS57208713A (en) Bias controlling circuit
JPS57125421A (en) Current supply circuit
EP0067686A3 (en) Power supply device for atomizer used in atomic absorptiometer
JPS647719A (en) Transmitting power control circuit
JPS57133707A (en) Bias circuit for power amplifier
JPS5557919A (en) Voltage-current control circuit
JPS57154965A (en) Constant current source type filter having self-bias function
JPS5539918A (en) Voltage and current output circuit
JPS57138206A (en) Power amplifier
JPS57189224A (en) Switching control type power supply