Patent ID: 9100033
Filing Date: 2015-08-04
Classification: H03F,H04B

Abstract:
1. A method carried out by a digital power amplifier controller (DPAC), the DPAC comprising a digital measurement-correction module and a digital control-correction module, the method comprising: receiving, via an analog-to-digital converter (ADC), from a power-level sensor coupled to a signal-output node of a power amplifier, a digital power-measurement signal with respect to an output signal of the power amplifier; generating an adjusted digital power-measurement signal at least in part by using the digital measurement-correction module to apply a measurement-correction function for the power-level sensor to the digital power-measurement signal, wherein the power-level sensor exhibits a characteristic nonlinear power-measurement response, and wherein the measurement-correction function for the power-level sensor comprises a post-distortion function to correct for the characteristic nonlinear power-measurement response exhibited by the power-level sensor; generating a digital feedback signal based at least in part on the adjusted digital power-measurement signal; generating a digital power-control signal based at least in part on the digital feedback signal, the digital power-control signal reflecting a desired power level at the signal-output node of the power amplifier; generating an adjusted digital power-control signal at least in part by using the digital control-correction module to apply a control-correction function for the power amplifier to the digital power-control signal; and outputting the adjusted digital power-control signal via a digital-to-analog converter (DAC) to a power-control node of the power amplifier.