Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-01-24
2010-02-02
Tse, Young T. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C330S149000, C330S151000, C455S114300
Reexamination Certificate
active
07656964
ABSTRACT:
A system for detecting both forward and reverse power of a power amplifier in the presence of harmonics created by the power amplifier is provided. A forward power detection system receives detection signals from an in-phase amplifier leg and a quadrature-phase amplifier leg of the power amplifier. The forward power detection system applies a phase shift to the detection signals such that forward components of the detection signals are essentially in-phase, and reverse components of the detection signals are essentially 180 degrees out-of-phase. The phase shifted detection signals are then combined and filtered to provide a signal indicative of forward power. In a similar fashion, a reverse power detection system applies a phase shift to the detection signals to provide a signal indicative of reverse power.
REFERENCES:
patent: 5994965 (1999-11-01), Davis et al.
patent: 6515544 (2003-02-01), Suzuki et al.
patent: 7440734 (2008-10-01), Jones et al.
DeCoste David
Folkmann Andrew F.
Schooley Derek
RF Micro Devices, Inc.
Tse Young T.
Withrow & Terranova, P.L.L.C.
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