Efficient power amplifier with staggered power supply voltages

Details Efficient power amplifier with staggered power supply voltages Efficient power amplifier with staggered power supply voltages

1979-12-20

1982-03-09

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330255, 330267, 330295, H03F 304

Patent

active

043191991

ABSTRACT:
An amplifier which minimizes the power loss in its output stages is described. This is achieved by operating the several output stages from separate power supplies operating at staggered voltage levels. The output stages, which have parallel signal paths, are unity-gain emitter follower circuits connected so that the follower operating from the lowest usable power supply voltage always delivers the load current. Control circuitry shifts the load current from one output stage to another based upon the instantaneous relationship between supply voltages and the output voltage. The shift between output stages introduces very little signal distortion into the output.

REFERENCES:
patent: 4117418 (1978-09-01), Hoglund
patent: 4158179 (1979-06-01), Sakai et al.
patent: 4236120 (1980-11-01), White

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