JPS5957532A - Input switching circuit - Google Patents

Input switching circuit

Info

Publication number
JPS5957532A
JPS5957532A JP16652282A JP16652282A JPS5957532A JP S5957532 A JPS5957532 A JP S5957532A JP 16652282 A JP16652282 A JP 16652282A JP 16652282 A JP16652282 A JP 16652282A JP S5957532 A JPS5957532 A JP S5957532A
Authority
JP
Japan
Prior art keywords
terminal
input
tuner
switching
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.)
Pending
Application number
JP16652282A
Other languages
Japanese (ja)
Inventor
Osamu Tsukamoto
修 塚本
Makoto Sasaki
誠 佐々木
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 JP16652282A priority Critical patent/JPS5957532A/en
Publication of JPS5957532A publication Critical patent/JPS5957532A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings

Landscapes

  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To switch a preset channel to a desired channel by one step, by connecting a circuit supplying a muting signal to a tuner selecting terminal of the switch control terminal of an input selector. CONSTITUTION:A tuner output is applied to a terminal 2a and other inputs are supplied to terminals 2b, 2c. A signal supplied to an input terminal corresponding to each terminal is outputted to an output terminal 3 by supplying a positive leading edge pulse to input switching control terminals 4a, 4b and 4c respectively. In closing a contact of input changeover switches Sa, Sb and Sc, a positive pulse is applied to a corresponding control terminal. The control terminal 4a to the changeover to the tuner is provided with an input terminal 5. A muting signal outputted at the preset channel switching of the tuner is supplied to the terminal 5, and when this signal is fed to the terminal 4a, the input is switched automatically to the tuner.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、チューナイ」アンプにおける人力１ｕＪ換回
路に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a manual 1 uJ switching circuit in a "tunai" amplifier.

（従来技術） 従来、チコ−す付アンプで、グーユーナ部がプリセット
メモリ方式であり、あるプリセットチャンネルの放送を
聴こうとする場合、人力セレクタがチューナ以外の、例
えばＰＨ０ＮＯ等のボジノヨンにあるときは、まず、セ
レクタスイッチにてチューナに切換え、次いでプリセッ
トチャンネルスイッチにて選局するという２段階のステ
ップが必要であった０ （発明の目的） そこで本発明は、所望のプリセットチャンネルに１ステ
ツプで切換えるようにした入力切換回路を提供するもの
である。以下、図面により実施例を詳細に説明する。(Prior art) Conventionally, in an amplifier with a tuner, the controller section is of the preset memory type, and when trying to listen to a broadcast on a certain preset channel, when the manual selector is located at a position other than the tuner, for example, PH0NO, etc. However, two steps were required: first, switching to a tuner using a selector switch, and then selecting a channel using a preset channel switch.(Objective of the Invention) Therefore, the present invention provides a method for switching to a desired preset channel in one step. The present invention provides an input switching circuit as described above. Hereinafter, embodiments will be described in detail with reference to the drawings.

（実施例の説明） 図は、本発明の一実施例を示したものである。(Explanation of Examples) The figure shows one embodiment of the invention.

図中１に電子切換回路部で、２ａ＋　２’）＋　２Ｃは
入力端子である。この場合、チューナ出力が端子２ａ如
加えられ、その他の人力（ＰＨ０ＮＯ，ＡＵＸ等）がそ
れぞれ端子２ｂ、２ｃに加えられる。４ａ、　４ｂ、　
４ｃは入力切換コントロール端子で、正の立」二がりパ
ルスを加えることにより、それぞれの端子に７１応する
入力端子（４ａ　−ｐ　２ａ、　／Ｉｂ　−１２ｂ、　
４ｃ　−＋　２ｃ　）に加えられた信号が出力端子３に
出力される。Ｓａ。In the figure, 1 is an electronic switching circuit section, and 2a+2')+2C is an input terminal. In this case, tuner output is applied to terminal 2a, and other human power (PH0NO, AUX, etc.) is applied to terminals 2b and 2c, respectively. 4a, 4b,
4c is an input switching control terminal, and by applying a positive rising and falling pulse, the corresponding input terminals (4a - p 2a, /Ib - 12b,
4c −+2c ) is output to output terminal 3. Sa.

Ｓｂ、Ｓｃは入力切換スイッチで、接点を閉じることに
よりそれに対応したフン）　４ｔ−ル端子に正のパルス
が印加される。Sb and Sc are input changeover switches, and by closing the contacts, a positive pulse is applied to the corresponding 4t-le terminal.

チューすへの切換えのだめのコントｊｊ−ル端子４ａに
入力端子５が設けられている。この端子５には、チュー
ナのプリセットチャンネル切換時に出力されるミューテ
ィング信号（正の信号）が加えられる。このミューティ
ング信号が入力切換コントロール端子４ａに加えられる
と、入力は自動的にチューナに切換えられる。An input terminal 5 is provided at the control terminal 4a for switching to the tune. A muting signal (positive signal) output when switching the preset channels of the tuner is applied to this terminal 5. When this muting signal is applied to the input switching control terminal 4a, the input is automatically switched to the tuner.

以上のように構成された本実施例では、チューナのプリ
セットチャンネルを切換えると、その際出力されるミュ
ーティング信号による止のパルスが入力切換コントロー
ル端子のチューす選択端子４ａに常に加わるので、入力
セレクタがどのボジンヨンにある場合でも、強制的にチ
コーナに切換わる。In this embodiment configured as described above, when the preset channel of the tuner is switched, a stop pulse due to the muting signal output at that time is always applied to the tune selection terminal 4a of the input switching control terminal. is forced to switch to Chicona no matter which position it is in.

（発明の効果） 以上説明したように、本発明によれば、あるプリセット
チャンネルの放送を聴こうとする場合、単に、プリセン
トチャンネルスイッチを操作する１ステツプのみで、チ
、〜−すへの切換えと選局を同時に行ない、所望の放送
を聴くことができ、操作性向上の面で極めて効果が太き
い。(Effects of the Invention) As explained above, according to the present invention, when you want to listen to a broadcast on a certain preset channel, you can listen to a broadcast on a certain preset channel by simply operating the preset channel switch. You can listen to the desired broadcast by switching and selecting the channel at the same time, which is extremely effective in improving operability.

なお、さらに進んで、人力セレクタスイッチのうち、チ
ューナのセレクタスイッチを無くすることも可能となる
。It is also possible to go further and eliminate the tuner selector switch from among the human-powered selector switches.

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

図は、本発明の一実施例の構成図である。 ■　・　・・　電子切換回路部、　２ａ、　２ｂ、　２
ｃ・・・・・・　入力端子、　３・・・・・・・出力端
子、４ａ、　４ｂ、　４ｃ　・・・・・・入力切換コン
トロール端子、Ｓａ、　Ｓｂ、　Ｓｃ・・・・・・・切
換スイッチ、　５　・・・・・　ミューティング信号入
力端子。The figure is a configuration diagram of an embodiment of the present invention. ■ ・・・Electronic switching circuit section, 2a, 2b, 2
c...Input terminal, 3...Output terminal, 4a, 4b, 4c...Input switching control terminal, Sa, Sb, Sc...Switching Switch, 5... Muting signal input terminal.

Claims (1)

【特許請求の範囲】[Claims] チューす部が受信周波数プリセントメモリ方式であり、
プリモノ１チヤンネル切換時にミューティング信号が出
力され、かつ、入力セレクタが電子切換回路から外るチ
ュ〜す付アンプにおいて、前記入力セレクタにおける切
換コントロールｌｌ’ｆＡｆ子のチューナ選釈端子に前
記ミューティング信号を印加する回路を接続したことを
！［ｌｉ徴とする入力切換回路。The tuning section uses a receiving frequency precent memory method,
In an amplifier with a tuner in which a muting signal is output when switching a premono channel 1 and the input selector is removed from the electronic switching circuit, the muting signal is output to the tuner selection terminal of the switching control ll'fAf in the input selector. That you have connected the circuit that applies ! [Input switching circuit with li characteristics.
JP16652282A 1982-09-27 1982-09-27 Input switching circuit Pending JPS5957532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16652282A JPS5957532A (en) 1982-09-27 1982-09-27 Input switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16652282A JPS5957532A (en) 1982-09-27 1982-09-27 Input switching circuit

Publications (1)

Publication Number Publication Date
JPS5957532A true JPS5957532A (en) 1984-04-03

Family

ID=15832871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16652282A Pending JPS5957532A (en) 1982-09-27 1982-09-27 Input switching circuit

Country Status (1)

Country Link
JP (1) JPS5957532A (en)

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