JPH0266031U - - Google Patents
Info
- Publication number
- JPH0266031U JPH0266031U JP14643888U JP14643888U JPH0266031U JP H0266031 U JPH0266031 U JP H0266031U JP 14643888 U JP14643888 U JP 14643888U JP 14643888 U JP14643888 U JP 14643888U JP H0266031 U JPH0266031 U JP H0266031U
- Authority
- JP
- Japan
- Prior art keywords
- current
- drive circuit
- output transistor
- base
- capacitor
- 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 description 2
- 238000010586 diagram Methods 0.000 description 5
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- Electronic Switches (AREA)
Description
第1図ないし第3図は本考案による出力トラン
ジスタの駆動回路の実施例を示し、第1図は一実
施例を示す結線図、第2図は第1図によるベース
電流の変化を示す波形図、第3図は第1図と異な
る実施例を示す結線図、第4図は従来の出力トラ
ンジスタの駆動回路の一例を示す結線図、第5図
は負荷電流の変化を示す波形図である。
1:ホトカプラ、1b:ホトトランジスタ、4
:出力トランジスタ、5,12:電流制限抵抗、
7:駆動回路、13,14:コンデンサ。
1 to 3 show an embodiment of the output transistor drive circuit according to the present invention, FIG. 1 is a wiring diagram showing one embodiment, and FIG. 2 is a waveform diagram showing changes in base current according to FIG. 1. , FIG. 3 is a wiring diagram showing an embodiment different from that in FIG. 1, FIG. 4 is a wiring diagram showing an example of a conventional output transistor drive circuit, and FIG. 5 is a waveform diagram showing changes in load current. 1: Photocoupler, 1b: Phototransistor, 4
: Output transistor, 5, 12: Current limiting resistor,
7: Drive circuit, 13, 14: Capacitor.
Claims (1)
力トランジスタのベース・エミツタとを直列に接
続した駆動回路にベース電流を流し、前記出力ト
ランジスタを駆動する出力トランジスタの駆動回
路において、前記駆動回路に前記ベース電流の初
期値を増大するコンデンサを接続したことを特徴
とする出力トランジスタの駆動回路。 A base current is passed through a drive circuit in which a photocoupler light receiving element, a current limiting resistor, and the base and emitter of an output transistor are connected in series. An output transistor drive circuit characterized in that a capacitor is connected to increase the initial value of current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14643888U JPH0266031U (en) | 1988-11-09 | 1988-11-09 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14643888U JPH0266031U (en) | 1988-11-09 | 1988-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0266031U true JPH0266031U (en) | 1990-05-18 |
Family
ID=31415928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14643888U Pending JPH0266031U (en) | 1988-11-09 | 1988-11-09 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0266031U (en) |
-
1988
- 1988-11-09 JP JP14643888U patent/JPH0266031U/ja active Pending