JPS57115008A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS57115008A
JPS57115008A JP56000733A JP73381A JPS57115008A JP S57115008 A JPS57115008 A JP S57115008A JP 56000733 A JP56000733 A JP 56000733A JP 73381 A JP73381 A JP 73381A JP S57115008 A JPS57115008 A JP S57115008A
Authority
JP
Japan
Prior art keywords
trs
common collector
collector formed
current
substrate
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
JP56000733A
Other languages
Japanese (ja)
Inventor
Tsutomu Sugawara
Hisashi Yamada
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56000733A priority Critical patent/JPS57115008A/en
Publication of JPS57115008A publication Critical patent/JPS57115008A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To realize a power amplifying circuit which has small distortion and operates stably, by two NPN transistors (TR) of common collector formed on one substrate and also two PNP TRs of common collector formed on the same substrate.
CONSTITUTION: The 1st and 3rd TRs 15, 17 are NPN TRs of common collector formed on one semiconductor substrate. The 2nd and 4th TRs 16, 18 are PNP TRs of common collector formed on the same substrate. Densting the area ratio of emitters of the 1st and 3rd TRs and also that of the 2nd and 4th TRs as α, the bias current of the 3rd and 4th TRs without output current is α times the current sources 21, 22. Thus, the current can be made stable without any resistor for stabilization in an output circuit.
COPYRIGHT: (C)1982,JPO&Japio
JP56000733A 1981-01-08 1981-01-08 Power amplifier Pending JPS57115008A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000733A JPS57115008A (en) 1981-01-08 1981-01-08 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000733A JPS57115008A (en) 1981-01-08 1981-01-08 Power amplifier

Publications (1)

Publication Number Publication Date
JPS57115008A true JPS57115008A (en) 1982-07-17

Family

ID=11481923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000733A Pending JPS57115008A (en) 1981-01-08 1981-01-08 Power amplifier

Country Status (1)

Country Link
JP (1) JPS57115008A (en)

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