JPS5481760A - Audio amplifier - Google Patents

Audio amplifier

Info

Publication number
JPS5481760A
JPS5481760A JP14970877A JP14970877A JPS5481760A JP S5481760 A JPS5481760 A JP S5481760A JP 14970877 A JP14970877 A JP 14970877A JP 14970877 A JP14970877 A JP 14970877A JP S5481760 A JPS5481760 A JP S5481760A
Authority
JP
Japan
Prior art keywords
amplifier
terminal
resistor
input terminal
resistors
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
JP14970877A
Other languages
Japanese (ja)
Other versions
JPS6043682B2 (en
Inventor
Ryuichi Kioka
Masanobu Shinoda
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
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
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, NEC Engineering Ltd, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP52149708A priority Critical patent/JPS6043682B2/en
Publication of JPS5481760A publication Critical patent/JPS5481760A/en
Publication of JPS6043682B2 publication Critical patent/JPS6043682B2/en
Expired 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
    • H03F3/181—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)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To establish the amplifier suitable for circuit integration easy to handle and without requiring external mounting element, by feeding the bias potential and input signal via the resistor determining the amount of feedback and the in-phase amplifier of gain ''1'' to the inverting input terminal of the differential audio amplifier constituting the audio amplifier. CONSTITUTION:The bleeder circuit is constituted by connecting the resistors 6 and 7 series between the power supply terminal 3 and the common terminal 4. Next, the junction point of the resistors 6 and 7 is connected to the non-inverting input terminal of the audio amplifier 12 taking the differential amplifier as the input stage via the resistor 8, and the input signal is fed to the input terminal 1 while giving bias to the amplifier 12. On the other hand, the output terminal 2 is connected to the non-inverting terminal being the negative feedback input terminal of the amplifier 12 via the resistor 10, and the output of the in-phase amplifier 13 having the gain ''1'' taking the signal at the junction of the resistors 6 to 7 is fed to the terminal via the resistor 9. Thus, the power supply ripple appeared at the input terminal can be cancelled and no external mounting capacitor is required.
JP52149708A 1977-12-12 1977-12-12 signal amplifier Expired JPS6043682B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52149708A JPS6043682B2 (en) 1977-12-12 1977-12-12 signal amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52149708A JPS6043682B2 (en) 1977-12-12 1977-12-12 signal amplifier

Publications (2)

Publication Number Publication Date
JPS5481760A true JPS5481760A (en) 1979-06-29
JPS6043682B2 JPS6043682B2 (en) 1985-09-30

Family

ID=15481072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52149708A Expired JPS6043682B2 (en) 1977-12-12 1977-12-12 signal amplifier

Country Status (1)

Country Link
JP (1) JPS6043682B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677710A (en) * 1979-11-30 1981-06-26 Chino Works Ltd Zero-point adjusting circuit
JPS58161510A (en) * 1982-03-19 1983-09-26 Matsushita Electric Ind Co Ltd Amplifying circuit device
CN106301256A (en) * 2016-08-29 2017-01-04 江门市川琪科技有限公司 A kind of audio power amplifier circuit of power invariability

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677710A (en) * 1979-11-30 1981-06-26 Chino Works Ltd Zero-point adjusting circuit
JPS58161510A (en) * 1982-03-19 1983-09-26 Matsushita Electric Ind Co Ltd Amplifying circuit device
CN106301256A (en) * 2016-08-29 2017-01-04 江门市川琪科技有限公司 A kind of audio power amplifier circuit of power invariability

Also Published As

Publication number Publication date
JPS6043682B2 (en) 1985-09-30

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