JPS5688513A - Constant-current driving circuit - Google Patents
Constant-current driving circuitInfo
- 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
Links
Landscapes
- Control Of Electrical Variables (AREA)
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
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)
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 |
-
1979
- 1979-12-20 JP JP16651279A patent/JPS5688513A/en active Granted
Cited By (6)
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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