JPS58164340U

JPS58164340U - Signal switching circuit

Info

Publication number: JPS58164340U
Application number: JP5920282U
Authority: JP
Inventors: 奥井　勇; 裕斉藤
Original assignee: 株式会社東芝
Priority date: 1982-04-23
Filing date: 1982-04-23
Publication date: 1983-11-01

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

[Brief explanation of drawings]

第１図は従来の信号切換回路を示す回路図、第２図はこ
の考案の一実施例を示す回路図である。Ｑ１□〜Ｑ１？・・・トランジスタ、Ｒ□１．Ｒ１□・
・・抵抗、ＶＳｌ、ＶＳ２・・・第１、第２の入力信号
、ＳＷ・・・切換信号。FIG. 1 is a circuit diagram showing a conventional signal switching circuit, and FIG. 2 is a circuit diagram showing an embodiment of this invention. Q1□～Q1? ...transistor, R□1. R1□・
...Resistor, VSl, VS2...First and second input signals, SW...Switching signal.

Claims

[Scope of utility model registration request]

first and second transistors having first and second input signals applied to their bases and outputting their outputs to the emitters; a first transistor having one end connected to the emitters of the first and second transistors, respectively; the second resistor, and the first and second resistors.
A third resistor is connected to the collector, a common first constant current source is connected to the emitter, and one of the resistors is turned on and the other is turned off by a switching signal applied to the base.
a fourth transistor, fifth and sixth transistors whose bases and emitters are respectively connected to the collectors of the third and fourth transistors, and a common emitter of the fourth and fifth transistors; A signal switching circuit comprising: a second constant current source connected to the seventh transistor; and a seventh transistor whose base is connected to a common emitter of the fourth and fifth transistors.