Patent ID: 6799020
Filing Date: 2004-09-28
Classification: H03F

Abstract:
Parallel amplifier transmitter comprising:a) first signal transmission subsystem comprising a phase-controlled digital oscillator for generating a first phase-controlled digital mixing signal having a phase based on a first phase control signal, wherein the first signal transmission subsystem uses the first phase-controlled digital mixing signal to produce a first phase-controlled amplified signal having a first phase based on the first phase control signal; b) at least one additional signal transmission subsystem, each producing an additional phase-controlled amplified signal; c) combiner means for combining said phase-controlled amplified signals to produce a combined amplified signal; d) combiner power measurement means, operably connected to said combiner means, for measuring the power of said combined amplified signal and producing a combiner power measurement; and e) control module, operably connected to said combiner power measurement means and to each of said signal transmission subsystems, for receiving said combiner power measurement from said combiner power measurement means and for receiving a subsystem power measurement based on each of said phase-controlled amplified signals produced by each of said signal transmission subsystems, and for adjusting said first digital phase control signal based on the values of said combiner power measurement and said subsystem power measurements.