JPS5644210A - Transistor circuit - Google Patents

Transistor circuit

Info

Publication number
JPS5644210A
JPS5644210A JP12115679A JP12115679A JPS5644210A JP S5644210 A JPS5644210 A JP S5644210A JP 12115679 A JP12115679 A JP 12115679A JP 12115679 A JP12115679 A JP 12115679A JP S5644210 A JPS5644210 A JP S5644210A
Authority
JP
Japan
Prior art keywords
current
transistor
transistors
circuit
base
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
JP12115679A
Other languages
Japanese (ja)
Inventor
Akira Matsuzawa
Michihiro Inoue
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12115679A priority Critical patent/JPS5644210A/en
Publication of JPS5644210A publication Critical patent/JPS5644210A/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
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H03F3/347—DC amplifiers in which all stages are DC-coupled with semiconductor devices only in integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To enhance the input impedance, by handling the circuit, where emitters are connected commonly and a current Miller circuit is provided in the collector side, as one transistor as a fundamental unit. CONSTITUTION:Emitter currents of transistors 5 and 6 are equal to each other approximately by the current Miller circuit consisting of transistors 7 and 8. Base current IB2 of transistor 6 and base current IB1 of transistor 5 are obtained by the current division ratio dependent upon resistances R1 and R2 and current amplification factors hfe1 and hfe2 of both transistors; and as result, when input current Iin to terminal 1A is obtained, Iinapprox.=0 can be true for hfe1...R1approx.=hfe2...R2. Terminals 1A, 2A, and 3A are caused to correspond to the base, the collector, and the emitter respectively, and the whole of the circuit is regarded as one transistor and is used in various transistor circuits.
JP12115679A 1979-09-19 1979-09-19 Transistor circuit Pending JPS5644210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12115679A JPS5644210A (en) 1979-09-19 1979-09-19 Transistor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12115679A JPS5644210A (en) 1979-09-19 1979-09-19 Transistor circuit

Publications (1)

Publication Number Publication Date
JPS5644210A true JPS5644210A (en) 1981-04-23

Family

ID=14804231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12115679A Pending JPS5644210A (en) 1979-09-19 1979-09-19 Transistor circuit

Country Status (1)

Country Link
JP (1) JPS5644210A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60218910A (en) * 1984-04-13 1985-11-01 New Japan Radio Co Ltd Impedance conversion circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60218910A (en) * 1984-04-13 1985-11-01 New Japan Radio Co Ltd Impedance conversion circuit

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