JPS5675712A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS5675712A
JPS5675712A JP15265379A JP15265379A JPS5675712A JP S5675712 A JPS5675712 A JP S5675712A JP 15265379 A JP15265379 A JP 15265379A JP 15265379 A JP15265379 A JP 15265379A JP S5675712 A JPS5675712 A JP S5675712A
Authority
JP
Japan
Prior art keywords
differential amplifier
audio signal
output terminal
input terminal
resistor
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
JP15265379A
Other languages
Japanese (ja)
Inventor
Akihiko Hanai
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 JP15265379A priority Critical patent/JPS5675712A/en
Publication of JPS5675712A publication Critical patent/JPS5675712A/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
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor

Landscapes

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

Abstract

PURPOSE:To improve the characteristics such as distortion factor by feeding back from the output terminal of the 2nd differential amplifier to the input side of the first differential amplifier, in an amplifier connecting a load between the output terminals of two differential amplifiers. CONSTITUTION:The audio signal fed to a signal input terminal (j) is fed to the inverting input terminal of the 1st differential amplifier 1A. Next, the audio signal of inverted phase obtained at the output terminal (f) is fed to the inverting input terminal (h) of the 2nd differential amplifier 2B via a resistor R8. Since a resistor R9 having equal resistance value R8 is connected between the input terminal (h) and the output terminal (i) of the differential amplifier 2B, the audio signal having the inverted phase and the same amplitude as the audio signal at the output terminal (f) is obtained at the output terminal (i). Negative feedback is made with the feedback resistor R6 between the output terminal (i) and the noninverting input terminal (d) of the 1st differential amplifier 1A, and with the input resistor R5 between the input terminal (d) and ground potential, to obtain the audio signal improved in the characteristics such as distortion factor across the speaker 3C connected between the output terminals (f) and (i) of the two differential amplifiers.
JP15265379A 1979-11-26 1979-11-26 Power amplifier Pending JPS5675712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15265379A JPS5675712A (en) 1979-11-26 1979-11-26 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15265379A JPS5675712A (en) 1979-11-26 1979-11-26 Power amplifier

Publications (1)

Publication Number Publication Date
JPS5675712A true JPS5675712A (en) 1981-06-23

Family

ID=15545122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15265379A Pending JPS5675712A (en) 1979-11-26 1979-11-26 Power amplifier

Country Status (1)

Country Link
JP (1) JPS5675712A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172913U (en) * 1984-10-17 1986-05-17
EP0415080A2 (en) * 1989-08-25 1991-03-06 STMicroelectronics S.r.l. Device for converting unbalanced analog electric signals into fully-differential signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172913U (en) * 1984-10-17 1986-05-17
EP0415080A2 (en) * 1989-08-25 1991-03-06 STMicroelectronics S.r.l. Device for converting unbalanced analog electric signals into fully-differential signals

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