Switching regulator

Details Switching regulator Switching regulator

1983-07-19

1986-04-29

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

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

323901, G05F 156

Patent

active

045859884

ABSTRACT:
A control transistor (Q.sub.2) is connected between a base and an emitter of a switching transistor (Q.sub.1) for by-passing a base current of the switching transistor (Q.sub.1). In a transitional period immediately after application of an input voltage, a time-constant circuit (R.sub.8, R.sub.9, R.sub.10, R.sub.11, C.sub.4), which is connected to a base of the control transistor (Q.sub.2) through a diode (D.sub.5), supplies the base of the control transistor (Q.sub.2) with a voltage lower than the output voltage. Therefore, the control transistor (Q.sub.2) is turned ON immediately after the application of the input voltage to by-pass the base current of the switching transistor (Q.sub.2), whereby the switching transistor (Q.sub.1) is forced to be turned OFF. The switching transistor (Q.sub.1) is turned ON again by self-excitation and then is at once made to be turned OFF again by the effect of the time-constant circuit (R.sub.8, R.sub.9, R.sub.10, R.sub.11, C.sub.4). Such operation is repeated until the voltage at the output point (B) is increased as large as a predetermined voltage value.

REFERENCES:
patent: 3721836 (1973-03-01), Rippel
patent: 4034281 (1977-07-01), Morita et al.
patent: 4118739 (1978-10-01), Umehara
patent: 4207516 (1980-06-01), Babcock
patent: 4274034 (1981-06-01), Conklin
patent: 4307440 (1981-12-01), Inoue et al.
patent: 4380729 (1983-04-01), Kaku et al.
patent: 4464710 (1984-08-01), Gruber

Affiliated with

Also associated with

Rating

Switching regulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switching regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching regulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-143147