Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Reexamination Certificate
2006-07-04
2006-07-04
Choe, Henry (Department: 2817)
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
C330S295000
Reexamination Certificate
active
07071774
ABSTRACT:
A composite amplifier includes a first and a second power amplifier connected to a Chireix output network. A signal component separator and an IQ separator provide equal first and linear drive signal components that depends linearly on the amplitude A(t) of an amplitude modulated input signal. The signal component separator and IQ separator provide first and second nonlinear drive signal components that have the same magnitude but opposite signs and depend non-linearly as √1−A(t) on the amplitude A(t) and are in quadrature to the first and second linear drive signal components. Amplitude-phase adjusters individually adjust amplitudes and phases of the drive signal components to lower drive power consumption. Summers form a first composite drive signal to the first power amplifier by adding the adjusted first linear drive signal component to the adjusted first non-linear drive signal component a second composite drive signal to the second power amplifier by adding the adjusted second linear drive signal component to the adjusted second non-linear drive signal component.
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Choe Henry
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (publ)
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