JPS6115838U

JPS6115838U - Transistor drive circuit

Info

Publication number: JPS6115838U
Application number: JP9855584U
Authority: JP
Inventors: 正之青木; 伸洋保高
Original assignee: 信濃電気株式会社
Priority date: 1984-07-02
Filing date: 1984-07-02
Publication date: 1986-01-29

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は電圧駆動方法の回路図、第２図は電流駆動方法
の回路図、第３図は本考案の一実施例回路図、第４図は
ベース電流とコレクタ電流の関係ｉ、第５図は本考案の
一実施例回路図、第９図は他の実施例回路図である。１・・・順バイアス駆動用トランジスタ、２・・・順バ
イアス電源、３・・・電流制限用抵抗、４・・・制御用
トランジスタ、５・・・逆バイアス駆動用トランジスタ
、６・・・逆バイアス電源、７・・・オン信号源、８・
・・変流器、９・・・電流検出制御回路、１０・・・可
変電圧順バイアス電源、１１・・・電流検出用抵抗、１
２・・・抵坑、１３・・・最大順バイアス電流設定用基
準電圧源、１４・・・スイッチング用ダイオード、１５
・・・最低順バイアス電流設定用基準電圧源、１６・・
・スイッチング用ダイオード、１７・・・差動増幅器、
１８・・・分圧回路、１９・・・電圧始ｕ御回路、２０
・・・変圧器。Figure 1 is a circuit diagram of the voltage drive method, Figure 2 is a circuit diagram of the current drive method, Figure 3 is a circuit diagram of an embodiment of the present invention, Figure 4 is the relationship between base current and collector current, and The figure is a circuit diagram of one embodiment of the present invention, and FIG. 9 is a circuit diagram of another embodiment. DESCRIPTION OF SYMBOLS 1... Forward bias drive transistor, 2... Forward bias power supply, 3... Current limiting resistor, 4... Control transistor, 5... Reverse bias drive transistor, 6... Reverse Bias power supply, 7... On signal source, 8.
... Current transformer, 9... Current detection control circuit, 10... Variable voltage forward bias power supply, 11... Current detection resistor, 1
2...Resistor, 13...Reference voltage source for setting maximum forward bias current, 14...Switching diode, 15
...Reference voltage source for setting minimum forward bias current, 16...
・Switching diode, 17...differential amplifier,
18... Voltage divider circuit, 19... Voltage start u control circuit, 20
...Transformer.

Claims

[Scope of utility model registration request]

In a transistor drive circuit in which a forward bias power supply supplies a current to the base to turn it on, and a reverse bias power supply supplies a reverse bias current to the base to turn it off, the emitter current of the transistor or proportional to this is used. A current detection circuit is provided, and the output voltage of the upward bias power supply is controlled by the output of the detection circuit, and the forward bias current flowing through the transistor is adjusted in response to an increase or decrease in the emitter current or a current proportional to this. A transistor drive circuit characterized by: