JPS57155817A - Graphic equalizer - Google Patents

Graphic equalizer

Info

Publication number
JPS57155817A
JPS57155817A JP56040806A JP4080681A JPS57155817A JP S57155817 A JPS57155817 A JP S57155817A JP 56040806 A JP56040806 A JP 56040806A JP 4080681 A JP4080681 A JP 4080681A JP S57155817 A JPS57155817 A JP S57155817A
Authority
JP
Japan
Prior art keywords
input
positive
resonance circuit
tone
turns
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
JP56040806A
Other languages
Japanese (ja)
Inventor
Kazuo Takayama
Kazutoshi Sasaki
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.)
Denso Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP56040806A priority Critical patent/JPS57155817A/en
Publication of JPS57155817A publication Critical patent/JPS57155817A/en
Pending 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
    • H03G5/025—Equalizers; Volume or gain control in limited frequency bands

Abstract

PURPOSE:To achive remote control and microprocessor control for the frequency characteristics, by controlling switches in a resistance circuit network changing the Q of a resonance circuit and those changing over either one at positive or negative side by means of binary data. CONSTITUTION:An input signal is applied to a positive side input of an operational amplfier OP through a resistor R and a part of an output OUT is fed back to a negative input through the R. At tone-down, a transistor (TR) SD constituting a changeover switch S1 turns on, a series resonance circuit RES1 in frequency f01 consisting of a capacitor C1 and an inductance L1 is connected to the positive input of the operational amplifier OP, and at tone-up, a TRSU turns on, and the series resonance circuit RES1 is connected to the negative input. On the other hand, a resistance circuit network RG having switches S2- S4 consisting of TRs is on-off-controlled with outputs Q0-Q3 of a data latch circuit RT abd changes frequencies near the center frequency f01.
JP56040806A 1981-03-20 1981-03-20 Graphic equalizer Pending JPS57155817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56040806A JPS57155817A (en) 1981-03-20 1981-03-20 Graphic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56040806A JPS57155817A (en) 1981-03-20 1981-03-20 Graphic equalizer

Publications (1)

Publication Number Publication Date
JPS57155817A true JPS57155817A (en) 1982-09-27

Family

ID=12590877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56040806A Pending JPS57155817A (en) 1981-03-20 1981-03-20 Graphic equalizer

Country Status (1)

Country Link
JP (1) JPS57155817A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140524U (en) * 1983-03-08 1984-09-19 日本ビクター株式会社 Frequency characteristic correction circuit
JPS6017020U (en) * 1983-07-12 1985-02-05 日本ビクター株式会社 equalizer circuit
JPS60103927U (en) * 1983-12-22 1985-07-16 パイオニア株式会社 Remote control graphic equalizer
JPH0539363U (en) * 1991-11-07 1993-05-28 三男 佐々木 Bed storage device under the floor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS501780A (en) * 1973-05-02 1975-01-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS501780A (en) * 1973-05-02 1975-01-09

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140524U (en) * 1983-03-08 1984-09-19 日本ビクター株式会社 Frequency characteristic correction circuit
JPS6017020U (en) * 1983-07-12 1985-02-05 日本ビクター株式会社 equalizer circuit
JPS60103927U (en) * 1983-12-22 1985-07-16 パイオニア株式会社 Remote control graphic equalizer
JPH0539363U (en) * 1991-11-07 1993-05-28 三男 佐々木 Bed storage device under the floor

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