JPH0336217U - - Google Patents

Info

Publication number
JPH0336217U
JPH0336217U JP9757089U JP9757089U JPH0336217U JP H0336217 U JPH0336217 U JP H0336217U JP 9757089 U JP9757089 U JP 9757089U JP 9757089 U JP9757089 U JP 9757089U JP H0336217 U JPH0336217 U JP H0336217U
Authority
JP
Japan
Prior art keywords
circuit
tone control
differential amplifier
output
control circuit
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
JP9757089U
Other languages
Japanese (ja)
Other versions
JPH0713298Y2 (en
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 filed Critical
Priority to JP1989097570U priority Critical patent/JPH0713298Y2/en
Publication of JPH0336217U publication Critical patent/JPH0336217U/ja
Application granted granted Critical
Publication of JPH0713298Y2 publication Critical patent/JPH0713298Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の１つの実施例に係るトーン
コントロール回路の構成を示す回路図、第２図は
第１図のトーンコントロール特性を示す線図、第
３図は第１図の変形例に係るトーンコントロール
回路を示す回路図である。第４図は従来のトーン
コントロール回路を示す回路図、第５図は第４図
のトーンコントロール特性を示す線図である。 主な符号の説明、１０……差動増幅器、１２…
…出力回路、１４……帰還回路、１８，１８Ａ…
…分圧回路。 Fig. 1 is a circuit diagram showing the configuration of a tone control circuit according to one embodiment of this invention, Fig. 2 is a diagram showing the tone control characteristics of Fig. 1, and Fig. 3 is a modification of Fig. 1. FIG. 2 is a circuit diagram showing such a tone control circuit. FIG. 4 is a circuit diagram showing a conventional tone control circuit, and FIG. 5 is a diagram showing the tone control characteristics of FIG. 4. Explanation of main symbols, 10...Differential amplifier, 12...
...Output circuit, 14...Feedback circuit, 18, 18A...
...Voltage divider circuit.

Claims (1)

【実用新案登録請求の範囲】 (1) オーデイオ信号が非反転入力端子に入力さ
れる差動増幅器号と、差動増幅器の出力側に設け
られて、互いにＣＲ回路で対称形に構成された出
力回路及び帰還回路と、を有するＮＦ・ＣＲ型の
トーンコントロール回路において、 帰還回路の出力端子と差動増幅器の反転入力端
子の間に分圧回路を介装し、 帰還回路の出力端子から見た分圧回路のインピ
ーダンスを、出力回路の負荷インピーダンスとほ
ぼ同じに設定したこと、 を特徴とするトーンコントロール回路。 (2) 分圧回路は分圧比を可変できるようにした
こと、を特徴とする請求項１記載のトーンコント
ロール回路。[Claims for Utility Model Registration] (1) A differential amplifier to which an audio signal is input to a non-inverting input terminal, and an output provided on the output side of the differential amplifier and configured symmetrically with each other using a CR circuit. In an NF/CR type tone control circuit having a circuit and a feedback circuit, a voltage divider circuit is interposed between the output terminal of the feedback circuit and the inverting input terminal of the differential amplifier, and A tone control circuit characterized in that the impedance of the voltage divider circuit is set to be almost the same as the load impedance of the output circuit. 2. The tone control circuit according to claim 1, wherein the voltage dividing circuit is configured to have a variable voltage dividing ratio.
JP1989097570U 1989-08-22 1989-08-22 Tone control circuit Expired - Lifetime JPH0713298Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989097570U JPH0713298Y2 (en) 1989-08-22 1989-08-22 Tone control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989097570U JPH0713298Y2 (en) 1989-08-22 1989-08-22 Tone control circuit

Publications (2)

Publication Number Publication Date
JPH0336217U true JPH0336217U (en) 1991-04-09
JPH0713298Y2 JPH0713298Y2 (en) 1995-03-29

Family

ID=31646707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989097570U Expired - Lifetime JPH0713298Y2 (en) 1989-08-22 1989-08-22 Tone control circuit

Country Status (1)

Country Link
JP (1) JPH0713298Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4691753B2 (en) * 2000-03-31 2011-06-01 ソニー株式会社 Sound quality adjustment circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254353A (en) * 1975-10-29 1977-05-02 Victor Co Of Japan Ltd Tone controller
JPS5541043A (en) * 1978-09-18 1980-03-22 Trio Kenwood Corp Tone control circuit
JPS5561117A (en) * 1978-10-31 1980-05-08 Trio Kenwood Corp Tone control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254353A (en) * 1975-10-29 1977-05-02 Victor Co Of Japan Ltd Tone controller
JPS5541043A (en) * 1978-09-18 1980-03-22 Trio Kenwood Corp Tone control circuit
JPS5561117A (en) * 1978-10-31 1980-05-08 Trio Kenwood Corp Tone control circuit

Also Published As

Publication number Publication date
JPH0713298Y2 (en) 1995-03-29

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