JPS5530219A - Current switch circuit - Google Patents

Current switch circuit

Info

Publication number
JPS5530219A
JPS5530219A JP10282378A JP10282378A JPS5530219A JP S5530219 A JPS5530219 A JP S5530219A JP 10282378 A JP10282378 A JP 10282378A JP 10282378 A JP10282378 A JP 10282378A JP S5530219 A JPS5530219 A JP S5530219A
Authority
JP
Japan
Prior art keywords
current
constant
transistor
control signal
trq10
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
JP10282378A
Other languages
Japanese (ja)
Inventor
Seiichi Ueda
Shigeru Kadokawa
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
Renesas Eastern Japan Semiconductor Inc
Original Assignee
Hitachi Tokyo Electronics Co Ltd
Hitachi Ltd
Hitachi Ome Electronic 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 Hitachi Tokyo Electronics Co Ltd, Hitachi Ltd, Hitachi Ome Electronic Co Ltd filed Critical Hitachi Tokyo Electronics Co Ltd
Priority to JP10282378A priority Critical patent/JPS5530219A/en
Publication of JPS5530219A publication Critical patent/JPS5530219A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/603—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors with coupled emitters

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To reduce current consumption in the cut-off time of an output current by providing a switching transistor between the base and emitter of a constant-current transistor and then by applying a constant voltage and control signal to both bases via resistances. CONSTITUTION:When control signal Defeat is at the earth level, transistor TrQ10 is OFF and constant-current transistor TrQ9 generates a constant current of I0= (VB1-VBEQ9)/R5. Then, when control signal Defeat is made high in level, TrQ10 is sturated and TrQ9 turns OFF to cut off an output constant current. Namely, setting adequately the values of resistances R6 and R7 reduce the current consumption.
JP10282378A 1978-08-25 1978-08-25 Current switch circuit Pending JPS5530219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10282378A JPS5530219A (en) 1978-08-25 1978-08-25 Current switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10282378A JPS5530219A (en) 1978-08-25 1978-08-25 Current switch circuit

Publications (1)

Publication Number Publication Date
JPS5530219A true JPS5530219A (en) 1980-03-04

Family

ID=14337734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10282378A Pending JPS5530219A (en) 1978-08-25 1978-08-25 Current switch circuit

Country Status (1)

Country Link
JP (1) JPS5530219A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143006A2 (en) * 1983-11-24 1985-05-29 Nec Corporation Light emitting diode driver circuit
US4633104A (en) * 1983-09-15 1986-12-30 Ferranti Plc Bipolar transistor logic circuits
US5013938A (en) * 1989-11-01 1991-05-07 National Semiconductor Corporation ECL cutoff driver circuit with reduced stanby power dissipation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524160A (en) * 1975-06-30 1977-01-13 Pioneer Electronic Corp Electrouic switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524160A (en) * 1975-06-30 1977-01-13 Pioneer Electronic Corp Electrouic switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633104A (en) * 1983-09-15 1986-12-30 Ferranti Plc Bipolar transistor logic circuits
EP0143006A2 (en) * 1983-11-24 1985-05-29 Nec Corporation Light emitting diode driver circuit
US5013938A (en) * 1989-11-01 1991-05-07 National Semiconductor Corporation ECL cutoff driver circuit with reduced stanby power dissipation

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