JPH02101628U - - Google Patents
Info
- Publication number
- JPH02101628U JPH02101628U JP955589U JP955589U JPH02101628U JP H02101628 U JPH02101628 U JP H02101628U JP 955589 U JP955589 U JP 955589U JP 955589 U JP955589 U JP 955589U JP H02101628 U JPH02101628 U JP H02101628U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- connection point
- switch
- power supply
- emitter
- 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
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
逆バイアス電圧対接合容量特性図、第３図は漏洩
電圧の分圧を説明するための等価回路図、第４図
は従来の一例の回路図である。
１，２……映像信号源、３……出力端子、４…
…漏洩電圧源、ＳＷ１，ＳＷ２……スイツチ、Ｑ
１〜Ｑ４……トランジスタ、Ｃ１′，Ｃ２′……
接合容量、Ｒ１，Ｒ２……抵抗、Ｖｃｃ……電源
。
Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a reverse bias voltage vs. junction capacitance characteristic diagram, Fig. 3 is an equivalent circuit diagram for explaining the division of leakage voltage, and Fig. 4 is a conventional circuit diagram. It is a circuit diagram of an example. 1, 2...Video signal source, 3...Output terminal, 4...
...Leakage voltage source, SW 1 , SW 2 ...Switch, Q
1 to Q4 ...transistor, C1 ', C2 '...
Junction capacitance, R 1 , R 2 ...resistance, Vcc ... power supply.
Claims (1)
エミツタ共通接続点と一方の電源端子との間に接
続された第１のスイツチと、該第２のトランジス
タのベースどうし及びそのコレクタどうしを接続
された第３のトランジスタと第４のトランジスタ
とのエミツタ共通接続点と上記一方の電源端子と
の間に接続された第２のスイツチとを有し、上記
第１のスイツチのオンで上記第１のトランジスタ
のベースに入力される第１の信号を上記第２及び
第３のトランジスタのコレクタ共通接続点から取
出す一方、上記第２のスイツチのオンで上記第４
のトランジスタのベースに入力される第２の信号
を該コレクタ共通接続点から取出す構成のスイツ
チ回路において、 上記第１及び第２のトランジスタのエミツタ共
通接続点と他方の電源端子との間に第１の抵抗を
接続し、上記第３及び第４のトランジスタのエミ
ツタ共通接続点と他方の電源端子との間に第２の
抵抗を接続してなるスイツチ回路。[Claims for Utility Model Registration] A first switch connected between a common emitter connection point of a first transistor and a second transistor and one power supply terminal; a second switch connected between a common emitter connection point of a third transistor and a fourth transistor whose collectors are connected to each other and one of the power supply terminals; When the second switch is on, the first signal input to the base of the first transistor is taken out from the common connection point of the collectors of the second and third transistors, while when the second switch is on, the first signal is input to the base of the first transistor.
In a switch circuit configured to take out a second signal input to the base of the transistor from the collector common connection point, a first signal is connected between the emitter common connection point of the first and second transistors and the other power supply terminal. a second resistor is connected between the emitter common connection point of the third and fourth transistors and the other power supply terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP955589U JPH02101628U (en) | 1989-01-30 | 1989-01-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP955589U JPH02101628U (en) | 1989-01-30 | 1989-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02101628U true JPH02101628U (en) | 1990-08-13 |
Family
ID=31216398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP955589U Pending JPH02101628U (en) | 1989-01-30 | 1989-01-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02101628U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0278317A (en) * | 1988-09-14 | 1990-03-19 | Hitachi Ltd | Signal switching circuit |
-
1989
- 1989-01-30 JP JP955589U patent/JPH02101628U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0278317A (en) * | 1988-09-14 | 1990-03-19 | Hitachi Ltd | Signal switching circuit |
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