JPS5813778U - Television receiver input signal switching device - Google Patents

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ＲＦ信号切換回路、第２図は制御電圧発生回路
、第３図は第２図の他の実施回路図である。 ■Ａ・・・・・・アンテナ入力端子、Ｉ、−・・・・・
ＶＴＲ入力端子、ＯＴ・・・・・−ＴＶ出力端子、ＳＳ
□・・・・・・第１スイツチ、Ｓ８２・・・・・・第２
スイツチ、Ｔ□・・・・・・第１スイツチングトランジ
スタ、Ｔ２・・・・・・第２スイツチングトランジスタ
。FIG. 1 is an RF signal switching circuit, FIG. 2 is a control voltage generation circuit, and FIG. 3 is another implementation circuit diagram of FIG. 2. ■A...Antenna input terminal, I...
VTR input terminal, OT...-TV output terminal, SS
□・・・・First switch, S82・・・・Second
Switch, T□...first switching transistor, T2...second switching transistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] アンテナ入力等の第１ＲＦ信号源の出力である第１ＲＦ
信号とＶＴＲ等の第２ＲＦ信号源の出力である第２ＲＦ
信号を切換えてＴＶ受像機のアンテナ入力端子に供給す
るＲＦ信号切換回路と、前記第２ＲＦ信号源の電源のオ
ン、オフに連動して２接点に切換わる第１スイツチと、
前記第１、第２ＲＦ信号の切換を選択する第２スイレチ
及び第１、第２スイツチ素子で形成され前記第１、第２
スイツチの出力によって制御され前記ＲＦ信号切換回路
制御用の直流制御電圧を発生する回路を備え、前記第１
スイツチの電源オフ位置に於いて前記直流制御電圧発生
回路は上記第２スイツチの切換位置とは無関係に上記Ｒ
Ｆ切換回路を制御して、上記ＴＶ受像機のアンテナ入力
端子に第１ＲＦ信号を供給すべ（構成したＴＶ受像機の
入力信号切換装置。a first RF which is the output of a first RF signal source such as an antenna input;
a second RF signal, which is the output of a second RF signal source such as a VTR;
an RF signal switching circuit that switches a signal and supplies it to an antenna input terminal of a TV receiver; a first switch that switches to two contacts in conjunction with turning on and off the power of the second RF signal source;
a second switch for selecting switching between the first and second RF signals, and a first and second switch element;
a circuit that is controlled by the output of the switch and generates a DC control voltage for controlling the RF signal switching circuit;
In the power OFF position of the switch, the DC control voltage generating circuit
An input signal switching device for a TV receiver configured to control an F switching circuit to supply a first RF signal to an antenna input terminal of the TV receiver.