Systems and methods of RF power transmission, modulation, and amplification, including embodiments for gain and phase control

An apparatus for at least power amplification, comprising:

• means for generating amplitude and phase information from I and Q data;
• means for generating a plurality of substantially constant envelope signals using at least said amplitude and phase information;
• an amplifier to amplify and combine said substantially constant envelope signals to create an output signal;
• means for measuring amplitude imbalances between said substantially constant envelope signals;
• and
• means for generating a gain balance control signal to compensate for said imbalances.

An apparatus for at least power amplification, comprising:

• means for generating amplitude and phase information from I and Q data;
• means for generating a plurality of substantially constant envelope signals using at least said amplitude and phase information;
• circuitry to amplify and combine said substantially constant envelope signals to create an output signal;
• means for measuring phase imbalances between said substantially constant envelope signals;
• and
• means for generating a phase balance control signal to compensate for said imbalances.

A power amplifier, comprising:

• a module to receive I and Q data and to generate amplitude and phase information;
• a plurality of circuitry to generate substantially constant envelope signals from at least said amplitude and phase information;
• an amplifier to amplify and combine said substantially constant envelope signals to generate an output signal;
• and
• differential amplitude and phase feedback circuitry to measure amplitude and phase imbalances between said substantially constant envelope signals and to generate at least one of a gain balance control signal and a phase balance control signal to compensate for said imbalances.

A power amplifier, comprising:

• a module to receive I and Q data and to generate amplitude and phase information;
• a plurality of circuitry to generate substantially constant envelope signals from at least said amplitude and phase information;
• an amplifier to amplify and combine said substantially constant envelope signals to generate an output signal;
• and
• differential amplitude feedback circuitry to measure amplitude imbalances between said substantially constant envelope signals and to generate a gain balance control signal to compensate for said imbalances.

A power amplifier, comprising:

• a module to receive I and Q data and to generate amplitude and phase information;
• a plurality of circuitry to generate substantially constant envelope signals from at least said amplitude and phase information;
• an amplifier to amplify and combine said substantially constant envelope signals to generate an output signal;
• and
• differential phase feedback circuitry to measure phase imbalances between said substantially constant envelope signals and to generate a phase balance control signal to compensate for said imbalances.

A method for at least power amplification, comprising:

• generating amplitude and phase information from I and Q data;
• generating a plurality of substantially constant envelope signals using at least said amplitude and phase information;
• amplifying and combining said substantially constant envelope signals to create an output signal;
• measuring amplitude and phase imbalances between said substantially constant envelope signals;
• and
• generating gain and phase balance control signals to compensate for said imbalances.

A method for at least power amplification, comprising:

• generating amplitude and phase information from I and Q data;
• generating a plurality of substantially constant envelope signals using at least said amplitude and phase information;
• amplifying and combining said substantially constant envelope signals to create an output signal;
• measuring amplitude imbalances between said substantially constant envelope signals;
• and
• generating a gain balance control signal to compensate for said imbalances.

A method for at least power amplification, comprising:

• generating amplitude and phase information from I and Q data;
• generating a plurality of substantially constant envelope signals using at least said amplitude and phase information;
• amplifying and combining said substantially constant envelope signals to create an output signal;
• measuring phase imbalances between said substantially constant envelope signals;
• and
• generating a phase balance control signal to compensate for said imbalances.