JPS6115837U

JPS6115837U - Transistor current drive circuit

Info

Publication number: JPS6115837U
Application number: JP9855484U
Authority: JP
Inventors: 正之青木
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の電流駆動方式の回路図、第２図は電圧駆
動方式の回路図、第３図および第４図は本考案の一実施
例回路図およびそのコレクタ電流とベース電流の関係図
、第５図は本考案の他の実施例回路図である。１・・・信号源、２・・・変流器、ＮＥ・・・エミツタ
電流巻線、、Ｎａ・・・ベース電流巻線、Ｎ３・・・短
絡用巻線、３・・・トランジスタ、４・・・負荷電源、
５・・・負荷、６・・・電流制限抵抗、７・・・電流設
定用抵抗、８・・・電流側路用ダイオード。Figure 1 is a circuit diagram of a conventional current drive system, Figure 2 is a circuit diagram of a voltage drive system, and Figures 3 and 4 are circuit diagrams of an embodiment of the present invention and their relationship between collector current and base current. , FIG. 5 is a circuit diagram of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Signal source, 2... Current transformer, NE... Emitter current winding, Na... Base current winding, N3... Short circuit winding, 3... Transistor, 4 ...Load power supply,
5... Load, 6... Current limiting resistor, 7... Current setting resistor, 8... Current bypass diode.

Claims

[Scope of utility model registration request]

A current transformer with an on signal winding, an emitter current winding, and a base current winding turns on the transistor by applying an on signal to the base, thereby changing the emitter-collector current to the emitter current. In a current drive circuit for a transistor that causes a current to flow through the base of the transistor through a winding and a base current winding to maintain an on state, the base current due to the feedback collector current is supplied via a current setting resistor, and the base current is supplied to the base of the transistor through a current setting resistor. A current drive circuit for a transistor, wherein a collector current feedback winding circuit of the current flow device is provided with a diode that bypasses when the base current due to the feedback exceeds the maximum current value set by the current setting resistor.