Radio-frequency Amplifier with Supply and Load Modulation

A method of operating wireless circuitry, comprising:

• with a radio-frequency amplifier, receiving a radio-frequency signal generated from a baseband signal;
• with supply modulation circuitry, outputting an envelope signal and outputting a power supply voltage derived from the baseband signal to a power supply terminal of the radio-frequency amplifier;
• with load modulation circuitry, outputting a load control signal derived from the baseband signal and the envelope signal;
• and
• tuning an adjustable load component of the radio-frequency amplifier based on the load control signal.

Wireless circuitry comprising:

• a radio-frequency amplifier configured to receive a radio-frequency signal generated from a baseband signal;
• a first envelope generation block configured to receive the baseband signal and to output a first envelope signal having a first bandwidth;
• and
• a second envelope generation block configured to receive the first envelope signal and to output a second envelope signal having a second bandwidth different than the first bandwidth.