Base drive circuit for high-power switching transistor

Details Base drive circuit for high-power switching transistor Base drive circuit for high-power switching transistor

1985-12-05

1987-01-20

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

363 16, 363 97, 307280, 307300, H02P 1320, H02M 3335

Patent

active

046382402

ABSTRACT:
Disclosed is a base drive circuit that provides a base drive current particularly adapted to switch a switching power transistor ON and OFF quickly. The base drive current includes a variable AC impedance device that responds to a control pulse to form a base drive having (a) an initial forward base drive peak that drives the switching power transistor toward deep saturation momentarily, followed by (b) an intermediate drive current of lower magnitude, sufficient to keep a high-power transistor at or near saturation, and (c) a high-amplitude reverse drive current for high-speed turn-off of the transistor.

REFERENCES:
patent: 2981850 (1961-04-01), Hoskinson
patent: 3569742 (1971-03-01), Schroeder
patent: 3983418 (1976-09-01), Wallace
patent: 4308577 (1981-12-01), Mentler
patent: 4312029 (1982-01-01), Zellmer
patent: 4420804 (1983-12-01), Nishino
R. Hammond et al., "High Power Vector Summation Switching Power Amplifier Development", PESC'81, IEEE, Boulder, Co, USA (29 Jun.-3 Jul. '81), pp. 267-272.

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