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1. (WO2010120767) ACTIVE FEED FORWARD AMPLIFIER

Pub. No.:    WO/2010/120767    International Application No.:    PCT/US2010/030876
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Wed Apr 14 01:59:59 CEST 2010
IPC: H03F 1/32
Applicants: VIASAT, INC.
CORMAN, David W.
Inventors: CORMAN, David W.
Title: ACTIVE FEED FORWARD AMPLIFIER
Abstract:
An exemplary embodiment of the feed forward amplifier replaces traditional distributed directional couplers, splitters, and delay lines. Moreover, an exemplary feed forward amplifier architecture combines active implementations of RF couplers, power splitters, and/or time delay elements in a novel fashion allowing for ultra-compact size and broadband performance. In an exemplary embodiment, a feed forward amplifier has a main amplifier path and an error amplifier path. The feed forward amplifier comprises a main amplifier in the main amplifier path, and at least one active vector generator in the error amplifier path. The at least one active vector generator is configured to adjust the phase and amplitude of an error amplifier path signal and an error amplifier is configured to receive the adjusted error amplifier path signal. Furthermore, the adjusted error amplifier path signal and an amplified signal are combined to form the output signal of the feed forward amplifier.