JPS56110319A - Control circuit of sound quality - Google Patents

Control circuit of sound quality

Info

Publication number
JPS56110319A
JPS56110319A JP1277780A JP1277780A JPS56110319A JP S56110319 A JPS56110319 A JP S56110319A JP 1277780 A JP1277780 A JP 1277780A JP 1277780 A JP1277780 A JP 1277780A JP S56110319 A JPS56110319 A JP S56110319A
Authority
JP
Japan
Prior art keywords
source
voltage
control
signal
flat
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
JP1277780A
Other languages
Japanese (ja)
Other versions
JPS6336565B2 (en
Inventor
Hiroyasu Shinpo
Minoru Ueda
Hirosuke Yamamoto
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 JP1277780A priority Critical patent/JPS56110319A/en
Publication of JPS56110319A publication Critical patent/JPS56110319A/en
Publication of JPS6336565B2 publication Critical patent/JPS6336565B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/04—Manually-operated control in untuned amplifiers

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

PURPOSE:To secure a sufficient range of control for sound qualtit, by adding the flat signals of half the positive and negative phase side of the frequency characteristics having a double value of the flat signal which functions as an voice signal. CONSTITUTION:The transistors (Q) Q17-Q20 form adouble balance differential amplifier. The amplitude is equal between the positive phase signal sorce SG1 and the negative phase source SG2, and the flat signal source SG3 has an amplitude half the SG1 and SG2. Then a control is given to the voltage that is applied to the base of Q17-Q20. Thus the outputs of the sources SG1 and SG2 can be applied in a vectorlike way to the output of the source SG3. A control is given to both the base voltage of Q17/Q18 and Q18/Q19 in a range from the voltage by which all currents flow to the collector of Q17 from the source SG1 to the voltage by which the 1/4 current flows from the source SG1. In such way, a wide range of control is secured for sound quality.
JP1277780A 1980-02-04 1980-02-04 Control circuit of sound quality Granted JPS56110319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1277780A JPS56110319A (en) 1980-02-04 1980-02-04 Control circuit of sound quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1277780A JPS56110319A (en) 1980-02-04 1980-02-04 Control circuit of sound quality

Publications (2)

Publication Number Publication Date
JPS56110319A true JPS56110319A (en) 1981-09-01
JPS6336565B2 JPS6336565B2 (en) 1988-07-20

Family

ID=11814830

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1277780A Granted JPS56110319A (en) 1980-02-04 1980-02-04 Control circuit of sound quality

Country Status (1)

Country Link
JP (1) JPS56110319A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817479U (en) * 1981-07-27 1983-02-03 ミサワホ−ム株式会社 opening frame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817479U (en) * 1981-07-27 1983-02-03 ミサワホ−ム株式会社 opening frame
JPS6212782Y2 (en) * 1981-07-27 1987-04-02

Also Published As

Publication number Publication date
JPS6336565B2 (en) 1988-07-20

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