Power amplifier

Details Power amplifier Power amplifier

2006-10-10

2006-10-10

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

C330S12400D, C330S136000

Reexamination Certificate

active

07119621

ABSTRACT:
A power amplifier for receiving and amplifying an input signal and outputting an output signal includes N power amplifying units (N is an integer larger than 1) connected in parallel so as to output amplified signals in response to the input signal; an output combining unit for combining the output signals from the N power amplifying units and outputting a combined signal as the output signal of the power amplifier; and an amplitude controlling unit for selectively turning ON each of the N power amplifying units based on an amplitude of the input signal. In the power amplifier, the amplitude controlling unit may includes N amplitude adjusters connected in parallel for adjusting the amplitude of the input signal of the power amplifier; and a controller for selectively turning ON each of the N power amplifying units and controlling the amplitude adjusters so that an amplitude of the output signal becomes a substantially continuous function with respect to the amplitude of the input signal.

REFERENCES:
patent: 5304943 (1994-04-01), Koontz
patent: 5886573 (1999-03-01), Kolanek
patent: 5974041 (1999-10-01), Kornfeld et al.
patent: 6137355 (2000-10-01), Sevic et al.
patent: 6255906 (2001-07-01), Eidson et al.
patent: 2003/0132800 (2003-07-01), Kenington

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