Patent ID: 7599448

Claim:
A method for selecting a modulation architecture, comprising: receiving a control input signal to select a modulation architecture; when a first modulation architecture is selected based on said control input signal: applying a time varying and substantially known baseband bias control signal to a bias input of a power amplification module; and applying a time varying and substantially known baseband modulation envelope signal to an input of said power amplification module; and when a second modulation architecture is selected based on said control input signal: applying said time varying and substantially known baseband modulation envelope signal to said bias input of said power amplification module; applying said time varying and substantially known baseband bias control signal to said input of said power amplification module; receiving a first signal from said input of said power amplification module; receiving a second signal from an output of said power amplification module; producing a third signal using either one of said first and second signals; mixing said first and said second signals to produce a first signal component; mixing said first and said third signal to produce a second signal component; wherein either one of said first and second signal components represents a phase and an amplitude difference between said first and second signals; selecting either said first signal or a fourth signal using a first switch; and selecting either said second signal or a fifth signal using a second switch.