Load modulated radio-frequency amplifier with extended tuning range

A method of operating wireless circuitry, comprising:

• receiving at an amplifier a radio-frequency signal that is generated based on a baseband signal;
• with a control signal generator, generating a control signal based on an envelope of the baseband signal;
• with a first conversion circuit, receiving the control signal and outputting a first load tuning control signal based on a first range of the control signal;
• with a second conversion circuit, outputting a second load tuning control signal based on a second range of the control signal;
• tuning a first adjustable load component coupled to an output of amplifier using the first load tuning control signal;
• tuning a second adjustable load component coupled to the output of the amplifier using the second load tuning control signal;
• and
• shifting the second load tuning control signal from the first load tuning control signal by a fixed or adjustable offset.

An electronic device comprising:

• one or more processors configured to generate a baseband signal;
• an upconverter configured to convert the baseband signal into a radio-frequency signal;
• and
• a load-line modulated amplifier circuit configured to amplify the radio-frequency signal, the load-line modulated amplifier circuit including
• an amplifier configured to receive the radio-frequency signal,
• a first adjustable load component coupled to an output of the amplifier and is configured to provide a first tuning range covering a first subrange of an instantaneous signal envelope of the baseband signal or the radio-frequency signal, and
• a second adjustable load component coupled to the output of the amplifier and is configured to provide a second tuning range covering a second subrange of the instantaneous signal envelope of the baseband signal or the radio-frequency signal, wherein the first and second tuning ranges are combined to provide an extended tuning range for the load-line modulated amplifier circuit.