JPS5558607A - Amplifier circuit - Google Patents

Amplifier circuit

Info

Publication number
JPS5558607A
JPS5558607A JP13103278A JP13103278A JPS5558607A JP S5558607 A JPS5558607 A JP S5558607A JP 13103278 A JP13103278 A JP 13103278A JP 13103278 A JP13103278 A JP 13103278A JP S5558607 A JPS5558607 A JP S5558607A
Authority
JP
Japan
Prior art keywords
resistance
amplifier
input terminal
current limiting
head phone
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
JP13103278A
Other languages
Japanese (ja)
Inventor
Hiroshi Usami
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.)
Teac Corp
Original Assignee
Teac Corp
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 Teac Corp filed Critical Teac Corp
Priority to JP13103278A priority Critical patent/JPS5558607A/en
Publication of JPS5558607A publication Critical patent/JPS5558607A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback

Landscapes

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

Abstract

PURPOSE:To limit a current at a load short time to prevent destruction of elements and make output impedance small by providing a negative feedback circuit between the connection point of a current limiting element, which is connected to the output side, and a load and the input terminal of an amplifier. CONSTITUTION:Current limiting resistance R01 is connected between amplifier 2 and head phone 3, and variable resistance Rf for negative feedback is connected between the connection point of resistance R01 and head phone 3 and the input terminal of amplifier 2. Signals applied to input terminal 1 are supplied to amplifier 2 through resistance R4, capacitor C1 and resistance R1 and are amplified there by the two-stage amplifier circuit consisting of transistor circuits Q1, Q2 and Q3 and the amplifier circuit consisting of transistors Q4 and Q5 of push-pull emitter follower and have the current limited properly by current limiting resistance R01 and are supplied to head phone 3.
JP13103278A 1978-10-26 1978-10-26 Amplifier circuit Pending JPS5558607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13103278A JPS5558607A (en) 1978-10-26 1978-10-26 Amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13103278A JPS5558607A (en) 1978-10-26 1978-10-26 Amplifier circuit

Publications (1)

Publication Number Publication Date
JPS5558607A true JPS5558607A (en) 1980-05-01

Family

ID=15048416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13103278A Pending JPS5558607A (en) 1978-10-26 1978-10-26 Amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5558607A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002054586A1 (en) * 2000-12-28 2002-07-11 Koninklijke Philips Electronics N.V. Cmos radio frequency amplifier with inverter driver

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50146250A (en) * 1974-05-13 1975-11-22
JPS5218150A (en) * 1975-08-01 1977-02-10 Yokogawa Hokushin Electric Corp Dc amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50146250A (en) * 1974-05-13 1975-11-22
JPS5218150A (en) * 1975-08-01 1977-02-10 Yokogawa Hokushin Electric Corp Dc amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002054586A1 (en) * 2000-12-28 2002-07-11 Koninklijke Philips Electronics N.V. Cmos radio frequency amplifier with inverter driver

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