JPS60167433U - Signal switching circuit - Google Patents
Signal switching circuitInfo
- Publication number
- JPS60167433U JPS60167433U JP5435984U JP5435984U JPS60167433U JP S60167433 U JPS60167433 U JP S60167433U JP 5435984 U JP5435984 U JP 5435984U JP 5435984 U JP5435984 U JP 5435984U JP S60167433 U JPS60167433 U JP S60167433U
- Authority
- JP
- Japan
- Prior art keywords
- differential amplifier
- signal switching
- input
- signal
- switching circuit
- 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
Links
Landscapes
- Electronic Switches (AREA)
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
第１図は従来の信号切換回路を示す回路図、第２図は他
の従来例を示す回路図、第３図は本考案に係る信号切換
回路の実施例を示す回路図、第４図は第３図の回路を一
般化して示す回路図である。
３８、３９．４６．５１．５３．５８．５９．−６２．
６５．６７・・・トランジスタ、３８．３９・・・差動
アンプを構成するトランジスタ、５８．５９・・・差動
アンプを構成するトランジスタ、４６，６２・・・差動
アンプを構成するトランジスタ、４７゜４９、５０．６
３．６４・・・抵抗、４８・・・信号出力端子、７０．
７１・・・バイアス電圧源、７２・・・定電流回路、Ｓ
□、Ｓ２・・・信号切換入力、Ｖａ、 Ｖｂ・・・入力
信号。Fig. 1 is a circuit diagram showing a conventional signal switching circuit, Fig. 2 is a circuit diagram showing another conventional example, Fig. 3 is a circuit diagram showing an embodiment of the signal switching circuit according to the present invention, and Fig. 4 is a circuit diagram showing an embodiment of the signal switching circuit according to the present invention. FIG. 4 is a circuit diagram generalizing the circuit of FIG. 3; 38, 39.46.51.53.58.59. -62.
65.67...Transistor, 38.39...Transistor forming differential amplifier, 58.59...Transistor forming differential amplifier, 46,62...Transistor forming differential amplifier, 47°49, 50.6
3.64...Resistor, 48...Signal output terminal, 70.
71... Bias voltage source, 72... Constant current circuit, S
□, S2...Signal switching input, Va, Vb...Input signal.
Claims (1)
択し出力する信号切換回路において、二つのトランジス
タにて構成される第１の差動アンプの共通エミッタに入
力信号電流を加え、その一方のトランジスタのベース電
圧を信号切換入力で制御することにより他方のトランジ
スタのコレクタより出力信号を得る回路を複数有して成
る第１の差動アンプ群の各第１の差動アンプの各共通エ
ミッタに、夫々ベース・コレクタ間に抵抗を接続したト
ランジスタのコレクタを接続しそれらのエミッタを共通
とした第２の差動アンプと、この第２の差動アンプの共
通エミッタに接続した単一の定電流源と、前記第２の差
動アンプの各トランジスタのベース入力を前記第１の差
動アンプ群に加えられる前記信号切換入力に応じて制御
する手段とを具備して成る信号切換回路。In a signal switching circuit that selects and outputs one signal from multiple input signals according to the signal switching input, an input signal current is applied to the common emitter of a first differential amplifier composed of two transistors, and one of the signals is Each common emitter of each first differential amplifier of a first differential amplifier group comprising a plurality of circuits that obtain an output signal from the collector of the other transistor by controlling the base voltage of the transistor with a signal switching input. A second differential amplifier is connected to the collectors of transistors each having a resistor connected between their bases and collectors, and their emitters are common, and a single constant is connected to the common emitter of this second differential amplifier. A signal switching circuit comprising: a current source; and means for controlling a base input of each transistor of the second differential amplifier according to the signal switching input applied to the first differential amplifier group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5435984U JPS60167433U (en) | 1984-04-12 | 1984-04-12 | Signal switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5435984U JPS60167433U (en) | 1984-04-12 | 1984-04-12 | Signal switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60167433U true JPS60167433U (en) | 1985-11-07 |
Family
ID=30576042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5435984U Pending JPS60167433U (en) | 1984-04-12 | 1984-04-12 | Signal switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60167433U (en) |
-
1984
- 1984-04-12 JP JP5435984U patent/JPS60167433U/en active Pending
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