JPH028226U - - Google Patents
Info
- Publication number
- JPH028226U JPH028226U JP8533488U JP8533488U JPH028226U JP H028226 U JPH028226 U JP H028226U JP 8533488 U JP8533488 U JP 8533488U JP 8533488 U JP8533488 U JP 8533488U JP H028226 U JPH028226 U JP H028226U
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor switch
- input terminal
- guard
- common potential
- potential point
- 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
- 239000004065 semiconductor Substances 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案の１実施例の構成を示す構成図
、第２図は従来の多点記録計などの入力側に使用
される半導体スイツチを含む増幅器の構成を示す
構成図である。
Ｑ……増幅器、ＧＤ……ガード、ＳＷ１，ＳＷ
２……半導体スイツチ、Ｃｏ……浮遊容量、Ｃｓ
……分布容量、Ｃｐ……選定コンデンサ、ＣＯＭ
……共通電位点、Ｖｃ……同相ノイズ、Ｖｉ……
入力電圧。
FIG. 1 is a block diagram showing the structure of one embodiment of the present invention, and FIG. 2 is a block diagram showing the structure of an amplifier including a semiconductor switch used on the input side of a conventional multi-point recorder. Q...Amplifier, GD...Guard, SW 1 , SW
2 ... Semiconductor switch, Co... Stray capacitance, Cs
...Distributed capacitance, Cp...Selected capacitor, COM
...Common potential point, Vc...Common mode noise, Vi...
input voltage.
Claims (1)
、この半導体スイツチの他端が入力端に接続され
周囲が共通電位点から絶縁されて前記入力端に接
続されたガードを有する増幅器と、前記半導体ス
イツチの両端に接続され前記ガードと前記共通電
位点との間の分布容量を考慮した所定の値のコン
デンサとを具備することを特徴とする半導体スイ
ツチの保護回路。 a semiconductor switch having one end connected to an input terminal; an amplifier having a guard connected to the input terminal with the other end of the semiconductor switch connected to the input terminal and whose surroundings are insulated from a common potential point; 1. A protection circuit for a semiconductor switch, comprising a capacitor connected to both ends and having a predetermined value in consideration of distributed capacitance between the guard and the common potential point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8533488U JPH0749868Y2 (en) | 1988-06-28 | 1988-06-28 | Semiconductor switch protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8533488U JPH0749868Y2 (en) | 1988-06-28 | 1988-06-28 | Semiconductor switch protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH028226U true JPH028226U (en) | 1990-01-19 |
| JPH0749868Y2 JPH0749868Y2 (en) | 1995-11-13 |
Family
ID=31310006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8533488U Expired - Lifetime JPH0749868Y2 (en) | 1988-06-28 | 1988-06-28 | Semiconductor switch protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749868Y2 (en) |
-
1988
- 1988-06-28 JP JP8533488U patent/JPH0749868Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0749868Y2 (en) | 1995-11-13 |
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