JPS5996940U - switching circuit - 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 drawings]

１　　第１図は従来回路の一例の回路図、第２図Ａ〜・
Ｇは従来回路及び本考案回路の動作説明用信号波形図、
第３図は本考案回路の−・実施例の回路図である。 ４・・・・・・出力端子、Ｖｌ・・・・・・映像信号源
、Ｖｃｃ、　−Ｖ５・・・・・・直流電源、Ｒ，、Ｒ２
・・・・・・抵抗、Ｑ１〜Ｑ４・・・・・・トランジス
タ。1 Figure 1 is a circuit diagram of an example of a conventional circuit, Figure 2 A~・
G is a signal waveform diagram for explaining the operation of the conventional circuit and the circuit of the present invention;
FIG. 3 is a circuit diagram of an embodiment of the circuit of the present invention. 4...Output terminal, Vl...Video signal source, Vcc, -V5...DC power supply, R,, R2
...Resistor, Q1-Q4...Transistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 第１の電流源を有し、第１の入力信号を供給されるＮＰ
Ｎ形トランジスタにて構成される第１のエミッタホロワ
回路と、第２の電流源を有し、第２の入力信号を供給さ
れるＰＮＰ形トランジスタにて構成される第２のエミッ
タホロワ回路とを設け、該第１及び第２の電流源をスイ
ッチング信号により該スイッチング信号のレベルに対応
して一方がオン（オフ）、他方がオフ（オン）となるよ
うに接続し、かつ、該第１のエミッタホロワ回路の出力
点と該第２のエミッタホロワ回路の出力点とを接続して
なり、該スイッチング信号により該第１及び第２のエミ
ッタホロワ回路をオン、オフせしめて該出力点より該第
１の入力信号と該第２の入力信号とをスイッチングして
出力するよう構成したスイッチング回路。NP having a first current source and being supplied with a first input signal
A first emitter follower circuit configured with an N-type transistor, and a second emitter follower circuit configured with a PNP-type transistor having a second current source and supplied with a second input signal, The first and second current sources are connected by a switching signal so that one is turned on (off) and the other is turned off (on) according to the level of the switching signal, and the first emitter follower circuit and the output point of the second emitter follower circuit are connected, and the first and second emitter follower circuits are turned on and off by the switching signal, and the first input signal is connected from the output point to the output point of the second emitter follower circuit. A switching circuit configured to switch and output the second input signal.