Method and apparatus for improving power transfer efficiency of

Details Method and apparatus for improving power transfer efficiency of Method and apparatus for improving power transfer efficiency of

1997-10-16

1999-11-23

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330127, 330 10, H03F 338

Patent

active

059907517

ABSTRACT:
A linear amplifier provides an output signal that is proportional to an input signal. A differential voltage control unit tracks the output signal voltage and controls the outputs of two pulse width modulators which drive a linear amplifier. The differential voltage control unit controls the output of the positive pulse width modulator to a fixed predetermined value in accordance with at least one of the input or output signals. The positive and negative pulse width modulators are driven by a positive and negative high voltage direct current power supplies respectively.

REFERENCES:
patent: 4115739 (1978-09-01), Sano et al.
patent: 4206419 (1980-06-01), Yokoyama
patent: 4430625 (1984-02-01), Yokoyama
patent: 5075634 (1991-12-01), French
patent: 5200711 (1993-04-01), Andersson et al.

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