JPS54158143A - Amplifier circuit - Google Patents

Amplifier circuit

Info

Publication number
JPS54158143A
JPS54158143A JP5741178A JP5741178A JPS54158143A JP S54158143 A JPS54158143 A JP S54158143A JP 5741178 A JP5741178 A JP 5741178A JP 5741178 A JP5741178 A JP 5741178A JP S54158143 A JPS54158143 A JP S54158143A
Authority
JP
Japan
Prior art keywords
power source
circuit
capacitor
charging
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
JP5741178A
Other languages
Japanese (ja)
Inventor
Noriji Ito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5741178A priority Critical patent/JPS54158143A/en
Priority to US06/035,640 priority patent/US4246544A/en
Priority to GB7915412A priority patent/GB2022949B/en
Priority to DE2919557A priority patent/DE2919557C3/en
Publication of JPS54158143A publication Critical patent/JPS54158143A/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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/083—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements in transistor amplifiers
    • 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
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits

Landscapes

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

Abstract

PURPOSE:To improve the rise characteristics at the making time of the power source by performing charging up to the middle potential of the power source via the transistor against the capacitor of the frequency compensation circuit which is connected to the reference input side of the differential amplifier circuit. CONSTITUTION:The charging is given to capacitor C4 of the signal input terminal from power source VCC at the power source making time, and thus charging transistor Q14 connected to capacitor C4 is turned on to charge quickly capacitor C2 which is connected to the other input side of the differential amplifier. When the charging ends, the base of Q14 features the middle potential of the power source to be turned off. As a result, the charging potential of capacitor C2 also features the middle potential of the power source, and thus the circuit starts the steady operation. This circuit gives the quick rise characteristics to the equalizer circuit in such case that the operation amplifier is used with one power source and that the equalizer circuit is provided to the feedback line. Thus, the circuit gats into the steady operation in a short time.
JP5741178A 1978-05-15 1978-05-15 Amplifier circuit Pending JPS54158143A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5741178A JPS54158143A (en) 1978-05-15 1978-05-15 Amplifier circuit
US06/035,640 US4246544A (en) 1978-05-15 1979-05-03 Bias circuit for a linear amplifier
GB7915412A GB2022949B (en) 1978-05-15 1979-05-03 Blas circuit for a linear amplifier
DE2919557A DE2919557C3 (en) 1978-05-15 1979-05-15 Bias circuit for a linear amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5741178A JPS54158143A (en) 1978-05-15 1978-05-15 Amplifier circuit

Publications (1)

Publication Number Publication Date
JPS54158143A true JPS54158143A (en) 1979-12-13

Family

ID=13054895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5741178A Pending JPS54158143A (en) 1978-05-15 1978-05-15 Amplifier circuit

Country Status (1)

Country Link
JP (1) JPS54158143A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4837051A (en) * 1971-09-13 1973-05-31
JPS4841653A (en) * 1971-09-27 1973-06-18

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4837051A (en) * 1971-09-13 1973-05-31
JPS4841653A (en) * 1971-09-27 1973-06-18

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