JPS57127313A - Tone control circuit - Google Patents

Tone control circuit

Info

Publication number
JPS57127313A
JPS57127313A JP56012464A JP1246481A JPS57127313A JP S57127313 A JPS57127313 A JP S57127313A JP 56012464 A JP56012464 A JP 56012464A JP 1246481 A JP1246481 A JP 1246481A JP S57127313 A JPS57127313 A JP S57127313A
Authority
JP
Japan
Prior art keywords
amplifier
tone
potential
output impedance
output
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
JP56012464A
Other languages
Japanese (ja)
Other versions
JPS6362131B2 (en
Inventor
Yoshio Seki
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 JP56012464A priority Critical patent/JPS57127313A/en
Publication of JPS57127313A publication Critical patent/JPS57127313A/en
Publication of JPS6362131B2 publication Critical patent/JPS6362131B2/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

Abstract

PURPOSE:To improve both the acoustic and tone control characteristics, by fixing the output of the 3rd amplifier at a certain level of potential in the case of a tone flat and accordingly actuating the 1st amplifier as just an ordinary amplifier to reduce the effect of a tone circuit element. CONSTITUTION:The sliders of variable resistors VR11 and VR12 are set at their centers respectively to obtain a tone flat. Thus these sliders are connected to an earth. The output impedance is sufficiently low for the 1st and 2nd amplifiers 13a and 13b since the negative feedback is applied to these amplifiers. On the other hand, the values of resistances R13-R16 and variable resistors VR11 and VR12 are larger than the above-mentioned output impedance by several digits, and these elements can be ignored. At the same time, the input terminal of the 3rd amplifier 13c is grounded through resistances R17 and R18 plus a capacitor C12, and the output impedance is sufficiently low compared with a resistance R10 due to the negative feedback. Then the potential of the output terminal of the amplifier 13c is fixed virtually at the earth potential.
JP56012464A 1981-01-29 1981-01-29 Tone control circuit Granted JPS57127313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012464A JPS57127313A (en) 1981-01-29 1981-01-29 Tone control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012464A JPS57127313A (en) 1981-01-29 1981-01-29 Tone control circuit

Publications (2)

Publication Number Publication Date
JPS57127313A true JPS57127313A (en) 1982-08-07
JPS6362131B2 JPS6362131B2 (en) 1988-12-01

Family

ID=11806074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012464A Granted JPS57127313A (en) 1981-01-29 1981-01-29 Tone control circuit

Country Status (1)

Country Link
JP (1) JPS57127313A (en)

Also Published As

Publication number Publication date
JPS6362131B2 (en) 1988-12-01

Similar Documents

Publication Publication Date Title
GB1515904A (en) Digitally controlled amplifying equipment
US3993968A (en) Single amplifier network for simulating an inductor
JPS57127313A (en) Tone control circuit
US3990025A (en) Network with a single amplifier for simulating an FDNR circuit
CA1063193A (en) Single amplifier network for simulating a super-inductor circuit
JPS5648186A (en) Photodetector
ES8601621A1 (en) Wideband kinescope driver amplifier
ATE11618T1 (en) FILTER CIRCUIT SUITABLE FOR MANUFACTURE AS AN INTEGRATED CIRCUIT.
JPS5531368A (en) Transmission amount control circuit
JPS55121732A (en) Biquad filter
RU2002304C1 (en) Function generator
US3999154A (en) Network with single amplifier for simulating FDNR circuit
JPH0614499Y2 (en) Electronic volume buffer circuit
JPS5477053A (en) Amplifier circuit
SU1170585A1 (en) Bidirectional amplifier
JPS5797713A (en) Equalizer amplifier
JPS5713810A (en) Monostable multivibrator
JPS54100640A (en) Variable equalizer
JPS5527723A (en) Tone control circuit
JPS5753129A (en) Active filter
JPS56168407A (en) Amplifier
JPS5628515A (en) Variable amplitude equalizer
JPS55153123A (en) Variable equalizing circuit
JPS5810800A (en) Circuit for generating acoustic signals with amplitude control
JPS56168412A (en) Negative impedance circuit