JPS5757012A - Transistor circuit - Google Patents

Transistor circuit

Info

Publication number
JPS5757012A
JPS5757012A JP56123533A JP12353381A JPS5757012A JP S5757012 A JPS5757012 A JP S5757012A JP 56123533 A JP56123533 A JP 56123533A JP 12353381 A JP12353381 A JP 12353381A JP S5757012 A JPS5757012 A JP S5757012A
Authority
JP
Japan
Prior art keywords
transistor
resistance
resistances
emitter
providing
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
JP56123533A
Other languages
Japanese (ja)
Inventor
Naotoshi Higashiyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56123533A priority Critical patent/JPS5757012A/en
Publication of JPS5757012A publication Critical patent/JPS5757012A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To reduce variance of the idling current, by providing two resistances between both ends of a Zener diode, providing a transistor at the connection point between them, and providing the third resistance between the Zener diode and the emitter of the transistor.
CONSTITUTION: The Zener voltage of a Zener diode 39 is divided by resistances 41 and 42, and the base of an npn transistor TR47 is connected to the division point. An emitter resistance 44 is provided in the emitter of the TR47 to constitute the second constant current circuit. The collector of the TR47 and the connection point between the common base and the collector of a pnp transistor 46 of the first constant current circuit are connected. Thus, the current flowed to the bias circuit is compensated for power supply variation by the operation of the diode 39 and is compensated for variation of the ambient temperature by a constant voltage dividing resistance ratio due to resistances 41 and 42 and the value of the resistance 44,
COPYRIGHT: (C)1982,JPO&Japio
JP56123533A 1981-08-06 1981-08-06 Transistor circuit Pending JPS5757012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56123533A JPS5757012A (en) 1981-08-06 1981-08-06 Transistor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56123533A JPS5757012A (en) 1981-08-06 1981-08-06 Transistor circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP48085957A Division JPS5034443A (en) 1973-07-30 1973-07-30

Publications (1)

Publication Number Publication Date
JPS5757012A true JPS5757012A (en) 1982-04-06

Family

ID=14862961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56123533A Pending JPS5757012A (en) 1981-08-06 1981-08-06 Transistor circuit

Country Status (1)

Country Link
JP (1) JPS5757012A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60158706A (en) * 1984-01-29 1985-08-20 Rohm Co Ltd Bias power supply

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508081A (en) * 1966-08-17 1970-04-21 Honeywell Inc Circuit arrangement for supplying a current signal to one or two loads

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508081A (en) * 1966-08-17 1970-04-21 Honeywell Inc Circuit arrangement for supplying a current signal to one or two loads

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60158706A (en) * 1984-01-29 1985-08-20 Rohm Co Ltd Bias power supply

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