JPS55100711A - Transistor differential amplifier circuit - Google Patents

Transistor differential amplifier circuit

Info

Publication number
JPS55100711A
JPS55100711A JP707679A JP707679A JPS55100711A JP S55100711 A JPS55100711 A JP S55100711A JP 707679 A JP707679 A JP 707679A JP 707679 A JP707679 A JP 707679A JP S55100711 A JPS55100711 A JP S55100711A
Authority
JP
Japan
Prior art keywords
transistors
pnp
npn
differential amplifier
amplifier circuit
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
JP707679A
Other languages
Japanese (ja)
Inventor
Morohisa Yamamoto
Yasuhiro Nunokawa
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 JP707679A priority Critical patent/JPS55100711A/en
Publication of JPS55100711A publication Critical patent/JPS55100711A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To improve high-frequency characteristics by providing a npn transistor in front of each pnp differential transistor. CONSTITUTION:To the base and emitter of a differential amplifier composed of pnp transistors Q1 and Q2 with their emitters connected in common, npn transistors Q3 and Q4 are connected at emitters and collectors respectively. Applying an input signal to npn transistors forms positive feedback loops between pnp transistors and npn transistors. As a result, even if pnp transistors low in high-band cut-off frequency would be used, characteristics can be improved extending to the high frequency range by npn transistors. Therefore, a video detection output circuit, etc., can be realized by using pnp lateral transistors.
JP707679A 1979-01-26 1979-01-26 Transistor differential amplifier circuit Pending JPS55100711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP707679A JPS55100711A (en) 1979-01-26 1979-01-26 Transistor differential amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP707679A JPS55100711A (en) 1979-01-26 1979-01-26 Transistor differential amplifier circuit

Publications (1)

Publication Number Publication Date
JPS55100711A true JPS55100711A (en) 1980-07-31

Family

ID=11655983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP707679A Pending JPS55100711A (en) 1979-01-26 1979-01-26 Transistor differential amplifier circuit

Country Status (1)

Country Link
JP (1) JPS55100711A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456887A (en) * 1980-09-25 1984-06-26 Pioneer Electronic Corporation Differential amplifier
JPS6016708A (en) * 1983-07-08 1985-01-28 Pioneer Electronic Corp Input circuit of differential amplifier
JPS621434U (en) * 1985-06-18 1987-01-07

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673508A (en) * 1970-08-10 1972-06-27 Texas Instruments Inc Solid state operational amplifier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673508A (en) * 1970-08-10 1972-06-27 Texas Instruments Inc Solid state operational amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456887A (en) * 1980-09-25 1984-06-26 Pioneer Electronic Corporation Differential amplifier
JPS6016708A (en) * 1983-07-08 1985-01-28 Pioneer Electronic Corp Input circuit of differential amplifier
JPS621434U (en) * 1985-06-18 1987-01-07

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