JPS5744308A - Amplitude controller - Google Patents

Amplitude controller

Info

Publication number
JPS5744308A
JPS5744308A JP55119410A JP11941080A JPS5744308A JP S5744308 A JPS5744308 A JP S5744308A JP 55119410 A JP55119410 A JP 55119410A JP 11941080 A JP11941080 A JP 11941080A JP S5744308 A JPS5744308 A JP S5744308A
Authority
JP
Japan
Prior art keywords
amplifier
output
supplied
line
changeover switches
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
JP55119410A
Other languages
Japanese (ja)
Inventor
Sadakatsu Hashimoto
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP55119410A priority Critical patent/JPS5744308A/en
Publication of JPS5744308A publication Critical patent/JPS5744308A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/04—Modifications of control circuit to reduce distortion caused by control

Landscapes

  • Electrophonic Musical Instruments (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To prevent distortion and a clip by eliminating variations in the level of a mean DC potential when amplitude is varied. CONSTITUTION:A signal from an input terminl P is inputted to a noninverting amplifier A1, operating as an input buffer, through a capacitor C1. The output of the amplifier A1 is supplied to one-side individual contacts of changeover switches S1- S4 from a line 5. The output of the ampifier A1 is supplied to an inverting amplifier A2. The output of the amplifier A2 is supplied to the other-side individual contacts of the changeover switches S1-S4 in common. To an output terminal Q, four resistances R1-R4 are connected in common, and the other-side terminals are connected to the common connection point of the changeover switches S1-S4. The mean value level of a signal supplied from the amplifier A1 to the line 5 and that of an output supplied from the amplifier A2 to a line 6 are equal, and their output waveform are each symmetric on the mean DC level.
JP55119410A 1980-08-28 1980-08-28 Amplitude controller Pending JPS5744308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55119410A JPS5744308A (en) 1980-08-28 1980-08-28 Amplitude controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55119410A JPS5744308A (en) 1980-08-28 1980-08-28 Amplitude controller

Publications (1)

Publication Number Publication Date
JPS5744308A true JPS5744308A (en) 1982-03-12

Family

ID=14760771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55119410A Pending JPS5744308A (en) 1980-08-28 1980-08-28 Amplitude controller

Country Status (1)

Country Link
JP (1) JPS5744308A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221930U (en) * 1988-07-29 1990-02-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221930U (en) * 1988-07-29 1990-02-14

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