JPS59161393U

JPS59161393U - transistor drive circuit

Info

Publication number: JPS59161393U
Application number: JP5612183U
Authority: JP
Inventors: 西田　俊郎
Original assignee: 三菱電機株式会社
Priority date: 1983-04-13
Filing date: 1983-04-13
Publication date: 1984-10-29

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 drawings]

第１図は従来の回路を示す接続図、第２図は第１図の各
部の波形を示す波形図、第３図はこの考案の一実施例を
示す接続図、第４図は第３図の各部の波形を示す波形図
である。１ａ・・・主トランジスタ、３・・・直流電源、４・・
・トランス、５７ａ、１６，１５ａｌ、１８ａ、５５ａ
。１１ａ、１５ａ２・・・固定バイアス回路、５１・・・
ＣＴ。５１Ｃ，５４・・・ベース電流供給回路、９ａ・・・バ
イパス用ダイオード。なお、各図中同一符号は同−又は
相当部分を示す。Figure 1 is a connection diagram showing a conventional circuit, Figure 2 is a waveform diagram showing waveforms of each part of Figure 1, Figure 3 is a connection diagram showing an embodiment of this invention, and Figure 4 is Figure 3. FIG. 1a... Main transistor, 3... DC power supply, 4...
・Trans, 57a, 16, 15al, 18a, 55a
. 11a, 15a2...Fixed bias circuit, 51...
C.T. 51C, 54... Base current supply circuit, 9a... Bypass diode. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

In a transistor live circuit that supplies a base current to operate a transistor in an unsaturated state that supplies a periodically intermittent current to a load whose impedance may change, the transistor is turned off and the period of the intermittent period is a fixed bias circuit that supplies the base current necessary to keep said transistor on for a period determined by; a current transformer in which the collector current of said transistor flows through its primary winding; and a secondary of said current transformer. means for connecting a side winding in parallel to the fixed bias circuit and supplying a base current of the transistor by a voltage induced in the secondary winding; A transistor drive circuit comprising: a bypass diode connected to bypass the current from the parallel connection point to the collector when the voltage becomes lower than the voltage at the parallel connection point with the next winding.