JPS5839723U - Signal switching circuit - Google Patents
Signal switching circuitInfo
- Publication number
- JPS5839723U JPS5839723U JP1981134192U JP13419281U JPS5839723U JP S5839723 U JPS5839723 U JP S5839723U JP 1981134192 U JP1981134192 U JP 1981134192U JP 13419281 U JP13419281 U JP 13419281U JP S5839723 U JPS5839723 U JP S5839723U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- stage transistor
- switch
- switching circuit
- drives
- 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.)
- Granted
Links
Landscapes
- Studio Circuits (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (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) [Abstract] 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の回路図、第２図は本考案
による信号切換回路を示す回路図である。
１・・・スイッチ群、２′・・・制御回路、１２・・・
制御端子、１３・・・排他論理和回路、１４・・・切換
スイッチ、１５ 、 Ｒ１，Ｒ２，Ｒ３，Ｒ４・・・抵
抗、Ｑ□、 Ｑ２・・・トランジスタ。FIG. 1 is a circuit diagram of a conventional signal switching circuit, and FIG. 2 is a circuit diagram showing a signal switching circuit according to the present invention. 1... Switch group, 2'... Control circuit, 12...
Control terminal, 13... Exclusive OR circuit, 14... Changeover switch, 15, R1, R2, R3, R4... Resistor, Q□, Q2... Transistor.
Claims (1)
生装置の再生信号または記録中の放送信号□ をゲート
する第３スイツチ生、上記再生信号に基づいて制御され
、上記第１スイツチを駆動する初段トランジスタと、こ
の初段トランジスタに縦続接続され、上記第３スイツチ
を駆動してかつ上記初段トランジスタの動作領域とは常
に異る動作領域に制御される次段トランジスタとで構成
し、上記第１スイツチ並びに第３スイツチを択一的に切
り換えて駆動し、受信装置で上記各信号を視聴可能とな
るように導出した切換回路において、上記初段トランジ
スタの制御電極に出力を導くと共に、上記再生信号と基
準レベルとを入力する排他論理和回路と、この排他論理
和回路に印加した上記基準レベルをこの基準レベルに対
し異るレベルの信号に切り換えて印加する切換スイッチ
とを設けたことを特徴とする信号切換回路。A first switch that gates the broadcast signal being broadcast, and a third switch that gates the playback signal of the recording/playback device or the broadcast signal being recorded, which is controlled based on the playback signal and drives the first switch. The first stage transistor is composed of a first stage transistor, and a next stage transistor is cascade-connected to the first stage transistor, drives the third switch, and is always controlled to an operating region different from the operating region of the first stage transistor, and the first stage transistor In addition, in a switching circuit that selectively switches and drives the third switch and derives the above signals so that each signal can be viewed by the receiving device, the output is guided to the control electrode of the first stage transistor, and the above reproduction signal and the reference signal are connected. and a changeover switch that switches the reference level applied to the exclusive OR circuit to a signal of a different level with respect to the reference level and applies the signal. switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981134192U JPS5839723U (en) | 1981-09-11 | 1981-09-11 | Signal switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981134192U JPS5839723U (en) | 1981-09-11 | 1981-09-11 | Signal switching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5839723U true JPS5839723U (en) | 1983-03-15 |
| JPH0119214Y2 JPH0119214Y2 (en) | 1989-06-05 |
Family
ID=29927625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981134192U Granted JPS5839723U (en) | 1981-09-11 | 1981-09-11 | Signal switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5839723U (en) |
-
1981
- 1981-09-11 JP JP1981134192U patent/JPS5839723U/en active Granted
Non-Patent Citations (1)
| Title |
|---|
| THE ELECTRONIC ENGINEER=1971 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0119214Y2 (en) | 1989-06-05 |
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