JPS60111139U - Muting circuit - Google Patents

Muting circuit

Info

Publication number
JPS60111139U
JPS60111139U JP20301783U JP20301783U JPS60111139U JP S60111139 U JPS60111139 U JP S60111139U JP 20301783 U JP20301783 U JP 20301783U JP 20301783 U JP20301783 U JP 20301783U JP S60111139 U JPS60111139 U JP S60111139U
Authority
JP
Japan
Prior art keywords
switch
circuit
muting circuit
turned
frequency changes
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
JP20301783U
Other languages
Japanese (ja)
Other versions
JPH0212756Y2 (en
Inventor
西川　謙治
音羽　良二
Original Assignee
富士通テン株式会社
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 富士通テン株式会社 filed Critical 富士通テン株式会社
Priority to JP20301783U priority Critical patent/JPS60111139U/en
Publication of JPS60111139U publication Critical patent/JPS60111139U/en
Application granted granted Critical
Publication of JPH0212756Y2 publication Critical patent/JPH0212756Y2/ja
Granted legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来のミューティング回廊の一例を示す構成図
、第２図はその動作波形図、第３図は本考案の一実施例
を示す構成図、第４図はその動作波形図である。 図中、ＳＷＵ、ＳＷＤはマニュアル選局スイッチ、ＭＴ
Ｘはマトリクス回路、ＣＴＬはコントロール回路、Ｑは
ミュート信号発生用トランジスタ、Ｄ□〜Ｄ４はダイオ
ードである。Fig. 1 is a block diagram showing an example of a conventional muting corridor, Fig. 2 is a diagram of its operating waveforms, Fig. 3 is a block diagram showing an embodiment of the present invention, and Fig. 4 is a diagram of its operating waveforms. . In the diagram, SWU and SWD are manual channel selection switches, MT
X is a matrix circuit, CTL is a control circuit, Q is a mute signal generating transistor, and D□ to D4 are diodes.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ブツシュ型のマニュアル送局スイッチをオンする毎に同
調周波数を１チヤンネルセパレーシヨンだけ変化させ、
また該スイッチを継続的にオンしたときは該スイッチが
一定時間毎に断続的にオンされたときと等価に該同調周
波数を変化させる電子同調型チューナのミューティング
回路において、該同調周波数の変化時期に同期してミュ
ート信号発生用のトランジスタを所定の時間幅だけオー
フにするコントロール回路と、該スイッチのオン期間は
強制的に該トランジスタの出力端を接地するダイオード
回路とを備えることを特徴とするミューティング回路。Each time you turn on the button-type manual transmission switch, the tuning frequency changes by one channel separation.
In addition, in a muting circuit of an electronically tuned tuner, when the switch is turned on continuously, the tuning frequency changes in the same way as when the switch is turned on intermittently at regular intervals. A control circuit that turns off a transistor for generating a mute signal for a predetermined time width in synchronization with the switch, and a diode circuit that forcibly grounds the output end of the transistor during the ON period of the switch. Muting circuit.
JP20301783U 1983-12-27 1983-12-27 Muting circuit Granted JPS60111139U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20301783U JPS60111139U (en) 1983-12-27 1983-12-27 Muting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20301783U JPS60111139U (en) 1983-12-27 1983-12-27 Muting circuit

Publications (2)

Publication Number Publication Date
JPS60111139U true JPS60111139U (en) 1985-07-27
JPH0212756Y2 JPH0212756Y2 (en) 1990-04-10

Family

ID=30765440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20301783U Granted JPS60111139U (en) 1983-12-27 1983-12-27 Muting circuit

Country Status (1)

Country Link
JP (1) JPS60111139U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645237U (en) * 1979-09-19 1981-04-23
JPS56125652U (en) * 1980-02-25 1981-09-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645237U (en) * 1979-09-19 1981-04-23
JPS56125652U (en) * 1980-02-25 1981-09-24

Also Published As

Publication number Publication date
JPH0212756Y2 (en) 1990-04-10

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