Doherty amplifier with drain bias supply modulation

Details Doherty amplifier with drain bias supply modulation Doherty amplifier with drain bias supply modulation

2008-09-30

2009-11-17

Mottola, Steven J (Department: 2817)

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

Reexamination Certificate

active

07619468

ABSTRACT:
An enhanced Doherty-configured amplifier that features separate and independent bias voltage sources for the main and auxiliary amplifiers. The bias voltage sources may be controllable and variable to alter the performance of the amplifier according to the input signal or system requirements. The enhanced amplifier includes a signal preparation unit to divide and shape the input signal in order to compensate for non-linearities in the combined output signal.

REFERENCES:
patent: 5568086 (1996-10-01), Schuss et al.
patent: 6703879 (2004-03-01), Okuda
patent: 7009454 (2006-03-01), Rategh et al.
patent: 2006/0293011 (2006-12-01), Park et al.
patent: 2008/0088369 (2008-04-01), Bowles

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