JPS5495159A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5495159A
JPS5495159A JP298778A JP298778A JPS5495159A JP S5495159 A JPS5495159 A JP S5495159A JP 298778 A JP298778 A JP 298778A JP 298778 A JP298778 A JP 298778A JP S5495159 A JPS5495159 A JP S5495159A
Authority
JP
Japan
Prior art keywords
sound volume
circuit
volume adjustment
negative feedback
adjustment unit
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
JP298778A
Other languages
Japanese (ja)
Inventor
Masahiro Matsubara
Makoto Okamasa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP298778A priority Critical patent/JPS5495159A/en
Publication of JPS5495159A publication Critical patent/JPS5495159A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the distortion rate of output by giving a constitution where the negative feedback quantity of a negative feedback circuit is automatically changed according to the adjustment position of a sound volume adjustment unit and preventing the distortion rate from changing due to the state of signal input.
CONSTITUTION: An amplifier is constituted by circuit 1, which is equipped with a sound volume adjustment unit and a sound volume adjustment position detector generating the output according to the adjustment position of the sound volume adjustment unit, and amplifier circuit 5 equipped with a negative feedback circuit which is controlled by the output from terminal 4 according to the position of the sound volume adjustment unit of circuit 1. In this constitution, circuit 1 is provided with variable resistance VR1, which constitutes a sound volume regulator, and variable resistor VR2, which constitutes a sound volume adjustment position detector, and these variable resistors VR1 and VR2 are interlocked with each other and are operated to apply the signal, which is detected by variable resistance VR2, to the feedback amplifier circuit of amplifier circuit 2 through terminal 4, thereby adjusting a negative feedback quantity.
COPYRIGHT: (C)1979,JPO&Japio
JP298778A 1978-01-13 1978-01-13 Amplifier Pending JPS5495159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP298778A JPS5495159A (en) 1978-01-13 1978-01-13 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP298778A JPS5495159A (en) 1978-01-13 1978-01-13 Amplifier

Publications (1)

Publication Number Publication Date
JPS5495159A true JPS5495159A (en) 1979-07-27

Family

ID=11544717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP298778A Pending JPS5495159A (en) 1978-01-13 1978-01-13 Amplifier

Country Status (1)

Country Link
JP (1) JPS5495159A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5721112A (en) * 1980-07-12 1982-02-03 Eikou Nomitsu Signal output variable amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5721112A (en) * 1980-07-12 1982-02-03 Eikou Nomitsu Signal output variable amplifier

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