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JPS5491038A - Low-frequency power amplifier - Google Patents

Low-frequency power amplifier

Info

Publication number
JPS5491038A
JPS5491038A JP15799977A JP15799977A JPS5491038A JP S5491038 A JPS5491038 A JP S5491038A JP 15799977 A JP15799977 A JP 15799977A JP 15799977 A JP15799977 A JP 15799977A JP S5491038 A JPS5491038 A JP S5491038A
Authority
JP
Japan
Prior art keywords
voltage
gain
terminal
variation
removal
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.)
Granted
Application number
JP15799977A
Other languages
Japanese (ja)
Other versions
JPS6038045B2 (en
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 JP52157999A priority Critical patent/JPS6038045B2/en
Publication of JPS5491038A publication Critical patent/JPS5491038A/en
Publication of JPS6038045B2 publication Critical patent/JPS6038045B2/en
Expired 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers

Landscapes

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

Abstract

PURPOSE:To reduce the number of terminals of an integrated circuit, and also to prevent the gain of an amplifier at a low frequency from decreasing by using one terminal both for the removal of voltage variation and for the determination of the gain. CONSTITUTION:In the low-frequency power amplifier equipped with the semiconductor integrated circut with signal input terminal 1, inversion input terminal 2, output terminal 5, power termanal 4, and earth terminal 6, and the circuit device for both line-voltage variation removal and gain determination, the collector of transistor 25 in the line-voltage-variation removal circuit device is connected power terminal 4 via resistance 24, and inversion input terminal 2 is grounded via resistance 16 and capacitor 17 connected in series and then connected to output terminal 5 via resistance 14 and capacitor 15 connected in series. Then, inversion input terminal 2 is used both for the removal of variation in line voltage and for the determination of the gain and the variation in output voltage against line-voltage fluctuation is lessened to obtain stable operation; and the voltage gain is determined by the ratio between resistances R14 and R16 connected externally to have no relation to the component parameter of the amplifier.
JP52157999A 1977-12-28 1977-12-28 low frequency power amplifier Expired JPS6038045B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52157999A JPS6038045B2 (en) 1977-12-28 1977-12-28 low frequency power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52157999A JPS6038045B2 (en) 1977-12-28 1977-12-28 low frequency power amplifier

Publications (2)

Publication Number Publication Date
JPS5491038A true JPS5491038A (en) 1979-07-19
JPS6038045B2 JPS6038045B2 (en) 1985-08-29

Family

ID=15662025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52157999A Expired JPS6038045B2 (en) 1977-12-28 1977-12-28 low frequency power amplifier

Country Status (1)

Country Link
JP (1) JPS6038045B2 (en)

Also Published As

Publication number Publication date
JPS6038045B2 (en) 1985-08-29

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