H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/13, 330/2
H03F 3/183 (2006.01) H03F 1/30 (2006.01) H03F 1/52 (2006.01) H03F 3/30 (2006.01)
Patent
CA 1264826
ABSTRACT OF THE DISCLOSURE The present disclosure describes a com- posite audio amplifier. The amplifier comprises at least one symmetrical, dual polarity audio amplifier power supply and a class AB audio amplifier circuit, the symmetrical, dual polarity audio amplifier power supply comprising a first and second reg- ulator circuit; the first regulator circuit deriving a reference signal from a negative regulated output and the second regulator circuit deriving a reference from a positive regulated output; the first and second regulator circuit deriving power from the positive regulated output and common and the negative regulated output and common respectively; the class AB audio amplifier circuit com- prising in combination a primary operational amplifier driving complementary power transistor output stages; the signal output of the primary operational amplifier being fed to complementary symmetric first and second arms of a current shunt network, the current shunt net- work adapted to shunt base current from the complementary power transistor output stages when the signal output of the primary operational amplifier exceeds a preset maximum threshold and, at the same time, the signal from said power output drops below a preset minimum threshold.
514384
Beale David G.
Charters John D.
Robic Robic & Associes/associates
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