JPS554123A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS554123A
JPS554123A JP7683378A JP7683378A JPS554123A JP S554123 A JPS554123 A JP S554123A JP 7683378 A JP7683378 A JP 7683378A JP 7683378 A JP7683378 A JP 7683378A JP S554123 A JPS554123 A JP S554123A
Authority
JP
Japan
Prior art keywords
transistor
input signal
constitution
signal
potential
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
JP7683378A
Other languages
Japanese (ja)
Inventor
Koichi Fukaya
Masashi Shoji
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 JP7683378A priority Critical patent/JPS554123A/en
Publication of JPS554123A publication Critical patent/JPS554123A/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
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor

Landscapes

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

Abstract

PURPOSE:To obtain a power amplifier which operates as a push-pull circuit at an output stage causing no abnormal distortion at every positive and negative half cycle of an input signal when an excessive input signal is applied, by employing a simple circuit constitution making use of a transistor, etc. CONSTITUTION:The base potential of transistor 12, when applied with a small signal, becomes higher than the earth potential by the base-emitter forward voltage of emitter follower transistor 10 and signal-voltage limiting transistor 27 is in an unconductive state and never impedes stationary operation. When a negative excessive input is applied, the base potential of transistor 12 is limited to a potential higher than its emitter-collector saturated voltage through the conduction of transistor 27. As a result, prior driving transistor 20 can be driven by the output signal of output terminal 3 at the input stage, and complementary transistor constitution 24 is neither unconducted nor driven insufficiently; no matter how large or small the input signal is, complementary transistor 24 in application of a negative input signal or complementary transistor constitution 23 in application of a positive input signal conducts to prevent an abnormal sound.
JP7683378A 1978-06-23 1978-06-23 Power amplifier Pending JPS554123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7683378A JPS554123A (en) 1978-06-23 1978-06-23 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7683378A JPS554123A (en) 1978-06-23 1978-06-23 Power amplifier

Publications (1)

Publication Number Publication Date
JPS554123A true JPS554123A (en) 1980-01-12

Family

ID=13616670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7683378A Pending JPS554123A (en) 1978-06-23 1978-06-23 Power amplifier

Country Status (1)

Country Link
JP (1) JPS554123A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7523524B2 (en) * 1999-03-10 2009-04-28 Alps Electric Co., Ltd. Ultrasonic cleaner and wet treatment nozzle comprising the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48102522A (en) * 1972-04-05 1973-12-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48102522A (en) * 1972-04-05 1973-12-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7523524B2 (en) * 1999-03-10 2009-04-28 Alps Electric Co., Ltd. Ultrasonic cleaner and wet treatment nozzle comprising the same

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