SYSTEMS AND METHODS FOR DELAY CALIBRATION IN POWER AMPLIFIER SYSTEMS

摘要

A power amplifier system is provided. The power amplifier system includes a power supply to generate a supply voltage based on an input signal, a power amplifier powered by the supply voltage to amplify the input signal and generate an output signal, a delay determiner to determine a delay mismatch between the input signal and the supply voltage, and a programmable delay block coupled to the delay determiner to compensate for the determined delay mismatch between the input signal and the supply voltage. The delay determiner determines the delay mismatch based on a first delay between the input and output signals when the input signal is below a threshold and a second delay between the input and output signals when the input signal is above the threshold.

主权项

1. A power amplifier system comprising:
a power supply configured to generate a supply voltage based on an input signal; a power amplifier powered by the supply voltage and configured to amplify the input signal and generate an output signal; a delay determiner coupled to the power amplifier, the delay determiner configured to determine a first delay between the input signal and the output signal when the input signal is below an amplitude threshold, determine a second delay between the input signal and the output signal when the input signal is above the amplitude threshold, and determine a delay mismatch between the input signal and the supply voltage based on the first delay and the second delay; and a programmable delay block coupled to the delay determiner and configured to compensate for the determined delay mismatch between the input signal and the supply voltage.