Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1983-07-25
1985-05-28
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363132, 323289, 307270, H02P 1320
Patent
active
045204381
ABSTRACT:
A switching amplifier in a bridge circuit configuration is provided with an improved base drive circuit which is highly efficient. The base drive circuit includes a base current shunting transistor across the base-to-emitter circuit of each high current transistor. The first and second high current transistors have their base-to-emitter circuits connected across the supply voltage terminals of the bridge in series with first and second inductors and in series with a first base current regulating transistor. The current in the first and second inductors increases while the first base current regulating transistor is turned on. The first and second diodes provide respective current paths for current through the first and second inductors and the base-to-emitter circuits of the first and second high current transistors when the first base current regulating transistor is turned off. The base drive circuits for the third and fourth high current transistors are the same as that as those described for the first and second high current transistors. A control circuit is disclosed for the base current regulating transistor to maintain the base drive current at a predetermined value. A load current sensing circuit is disclosed to obtain an accurate indication of the output current of the amplifier.
REFERENCES:
patent: 3976932 (1976-08-01), Collins
patent: 4020361 (1977-04-01), Suelzle et al.
patent: 4204266 (1980-05-01), Kammiller et al.
patent: 4224535 (1980-09-01), Wilson et al.
LandOfFree
Amplifier power stage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplifier power stage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplifier power stage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-871948