JPS5688513A - Constant-current driving circuit - Google Patents

Constant-current driving circuit

Info

Publication number
JPS5688513A
JPS5688513A JP16651279A JP16651279A JPS5688513A JP S5688513 A JPS5688513 A JP S5688513A JP 16651279 A JP16651279 A JP 16651279A JP 16651279 A JP16651279 A JP 16651279A JP S5688513 A JPS5688513 A JP S5688513A
Authority
JP
Japan
Prior art keywords
current
circuit
trq
rcs
constant
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
JP16651279A
Other languages
Japanese (ja)
Other versions
JPS6357808B2 (en
Inventor
Tetsuo Maeda
Shingi Yokobori
Yoshiaki Igarashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16651279A priority Critical patent/JPS5688513A/en
Publication of JPS5688513A publication Critical patent/JPS5688513A/en
Publication of JPS6357808B2 publication Critical patent/JPS6357808B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE: To provide stable constant-current drive by composing a constant-current driving circuit of a current Miller CM for current source operation, CM circuit for current absorbing operation and current amplifying circuit.
CONSTITUTION: Transistor TRs Q8WQ10 constitute the CM circuit for current source operation; the emitter of TRQ8 supplied with command input current IC is connected to a plus power source via resistance RC, and that of TRQ9 to the plus power source via resistances R1 and RCS. Then, TRs Q12 and Q13 constitute the CM circuit for current absorbing operation; the collector of booster TRQ11 of this circuit is connected to the plus power source, and its base and emitter are also connected to the collector and base of TRQ13 respectively. Load RL is connected between resistance RCS and current amplifier 3, which is grounded via TRQ14. When RCS≪R1=RC, I8=I9 because of the CM circuits to attain IL=(RC/RCS)IC and amplifier 3 is supplied to base outputs of TRs Q12 and Q13 to hold I8 and I9 symmetric, providing stable constant-current drive.
COPYRIGHT: (C)1981,JPO&Japio
JP16651279A 1979-12-20 1979-12-20 Constant-current driving circuit Granted JPS5688513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16651279A JPS5688513A (en) 1979-12-20 1979-12-20 Constant-current driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16651279A JPS5688513A (en) 1979-12-20 1979-12-20 Constant-current driving circuit

Publications (2)

Publication Number Publication Date
JPS5688513A true JPS5688513A (en) 1981-07-18
JPS6357808B2 JPS6357808B2 (en) 1988-11-14

Family

ID=15832702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16651279A Granted JPS5688513A (en) 1979-12-20 1979-12-20 Constant-current driving circuit

Country Status (1)

Country Link
JP (1) JPS5688513A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093964A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6093962A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6093963A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6093961A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6097280A (en) * 1983-10-31 1985-05-31 Yamatake Honeywell Co Ltd Overcurrent detecting circuit of electronic switch
JPH01212364A (en) * 1988-02-19 1989-08-25 Matsushita Electric Ind Co Ltd Load current detection circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093964A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6093962A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6093963A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6093961A (en) * 1983-10-28 1985-05-25 Yamatake Honeywell Co Ltd Over current detecting circuit of electronic switch
JPS6097280A (en) * 1983-10-31 1985-05-31 Yamatake Honeywell Co Ltd Overcurrent detecting circuit of electronic switch
JPH01212364A (en) * 1988-02-19 1989-08-25 Matsushita Electric Ind Co Ltd Load current detection circuit

Also Published As

Publication number Publication date
JPS6357808B2 (en) 1988-11-14

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