JPH0235530U - - Google Patents
Info
- Publication number
- JPH0235530U JPH0235530U JP11302188U JP11302188U JPH0235530U JP H0235530 U JPH0235530 U JP H0235530U JP 11302188 U JP11302188 U JP 11302188U JP 11302188 U JP11302188 U JP 11302188U JP H0235530 U JPH0235530 U JP H0235530U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- base
- whose
- output
- protection
- 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
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
Description
第１図は、本考案の実施例に係るトランジスタ
回路の保護回路の回路図、第２図は第１の電子機
器の電子回路内のトランジスタ回路と、第２の電
子機器の電子回路との回路図である。
Ａ…第１の電子機器の電子回路、Ｂ…第２の電
子機器の電子回路、Ｒｘ…低抵抗、Ｑ１…出力ト
ランジスタ、Ｑ２…制御トランジスタ、Ｒ１…バ
イアス抵抗、Ｒ２…ベース電流制限抵抗、Ｑ３…
第１の保護トランジスタ、Ｑ４…第２の保護トラ
ンジスタ、Ｑ５…第３の保護トランジスタ。
FIG. 1 is a circuit diagram of a protection circuit for a transistor circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a transistor circuit in an electronic circuit of a first electronic device and an electronic circuit of a second electronic device. It is a diagram. A...Electronic circuit of the first electronic device, B...Electronic circuit of the second electronic device, Rx...Low resistance, Q1...Output transistor, Q2...Control transistor, R1...Bias resistor, R2...Base current limiting resistor, Q3 …
A first protection transistor, Q4...a second protection transistor, Q5...a third protection transistor.
Claims (1)
るとともに、そのベースにベース電流制限抵抗の
一端側が接続された出力トランジスタと、 一端側が前記出力トランジスタの入力側に、他
端側が前記ベース電流制限抵抗の他端側にそれぞ
れ接続されたバイアス抵抗と、 入力側が前記バイアス抵抗の他端側に接続され
て、ベースへの制御信号の入力に応答してオンす
る制御トランジスタとで構成されたトランジスタ
回路の保護回路であつて、 入力側が前記出力トランジスタの入力側に、ベ
ースが前記バイアス抵抗の一端側にそれぞれ接続
された第１の保護トランジスタと、 入力側が前記第１の保護トランジスタの出力側
に、また、ベースが前記出力トランジスタの出力
側にそれぞれ接続された第２の保護トランジスタ
と、 ベースが前記第２の保護トランジスタの出力側
に、入力側が前記制御トランジスタのベースにそ
れぞれ接続された第３の保護トランジスタと、 前記第３の保護トランジスタのベースと出力側
との間に並列に接続された保護時間制御コンデン
サ とを具備したことを特徴とするトランジスタ回
路の保護回路。[Claims for Utility Model Registration] An output transistor that outputs a voltage signal on the input side to the output side when turned on, and has one end side of a base current limiting resistor connected to its base; one end side is connected to the input side of the output transistor; a bias resistor whose other end is connected to the other end of the base current limiting resistor; and a control transistor whose input side is connected to the other end of the bias resistor and is turned on in response to input of a control signal to the base. a first protection transistor whose input side is connected to the input side of the output transistor and whose base is connected to one end of the bias resistor; and a first protection transistor whose input side is connected to the first end of the bias resistor. a second protection transistor whose base is connected to the output side of the protection transistor and whose base is connected to the output side of the output transistor; whose base is connected to the output side of the second protection transistor and whose input side is connected to the base of the control transistor; A protection circuit for a transistor circuit, comprising: a third protection transistor connected to each other; and a protection time control capacitor connected in parallel between the base and the output side of the third protection transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11302188U JPH0235530U (en) | 1988-08-29 | 1988-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11302188U JPH0235530U (en) | 1988-08-29 | 1988-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0235530U true JPH0235530U (en) | 1990-03-07 |
Family
ID=31352492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11302188U Pending JPH0235530U (en) | 1988-08-29 | 1988-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0235530U (en) |
-
1988
- 1988-08-29 JP JP11302188U patent/JPH0235530U/ja active Pending
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