Multi-mode selectable modulation architecture calibration and power control apparatus, system, and method for radio frequency power amplifier

An apparatus to select a modulation architecture, comprising:

• a baseband processing module to receive a control input signal to select a modulation architecture;
• and
• a radio frequency (RF) processing module to apply a time varying and substantially known baseband bias control signal to a bias input of a power amplification module and to apply a time varying and substantially known baseband modulation envelope signal to an input of said power amplification module when a first modulation architecture is selected based on said control input signal;
• said RF processing module to apply said time varying and substantially known baseband modulation envelope signal to said bias input of said power amplification module and to apply said time varying and substantially known baseband bias control signal to said input of said power amplification module when a second modulation architecture is selected based on said control input signal;
• a first input to receive a first signal from said input of said power amplification module, said first signal exhibiting a varying phase and a varying and substantially known envelope;
• a second input to receive a second signal from an output of said power amplification module;
• a first mixer coupled to said first and second inputs to mix said first and said second signals and to produce a first signal component;
• a second mixer coupled to said second input and a third signal to mix 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;
• a first switch having a first and second input terminal to select either said first signal coupled to said first input terminal or a fourth signal coupled to said second input terminal, said selected signal coupled to a first output terminal of said first switch;
• and
• a second switch having a third and fourth input terminal to select either said second signal coupled to said third input terminal or a fifth signal coupled to said fourth input terminal, said selected signal coupled to a second output terminal of said second switch.

A system to select a modulation architecture, comprising:

• an amplifier comprising a bias input, an input, and an output;
• and
• a detection module comprising:
• a first input coupled to said input of said amplifier to receive a first signal, said first signal exhibiting a time varying and substantially known baseband modulation envelope signal when a first modulation architecture is selected based on a control input signal and said first signal exhibiting time varying and substantially known baseband bias control signal when a second modulation architecture is selected based on said control input signal;
• a second input coupled to said output of said amplifier to receive a second signal;
• a first mixer coupled to said first and second inputs of said detection module to mix said first and said second signals and to produce a first signal component;
• a second mixer coupled to said second input of said detection module to mix said first signal and a third signal and to produce a second signal component;
• a first switch having a first and second input terminal to select either said first signal coupled to said first input terminal or a fourth signal coupled to said second input terminal, said selected signal coupled to a first output terminal of said first switch;
• and
• a second switch having a third and fourth input terminal to select either said second signal coupled to said third input terminal or a fifth signal coupled to said fourth input terminal, said selected signal coupled to a second output terminal of said second switch;
• wherein either one of said first and second signal components represents a phase and an amplitude difference between said first and second signals.