Acoustic load-line tuning in a wireless transmission circuit

A wireless transmission circuit comprising:

• an acoustic load-line tuning circuit comprising:
• a plurality of acoustic resonator structures coupled in parallel between a signal input and a signal output, each of the plurality of acoustic resonator structures is configured to resonate at a series resonance frequency to present a respective one of a plurality of load-line impedances at the signal input in response to receiving a respective one of a plurality of pulse voltages;
• and
• a control circuit configured to:
• determine a desired load-line impedance at the signal input;
• and
• apply the respective one of the plurality of pulse voltages to a selected one of the plurality of acoustic resonator structures having the respective one of the plurality of load-line impedances that is closest to the desired load-line impedance.

A method for performing acoustic impedance tuning in a wireless transmission circuit comprising:

• coupling a plurality of acoustic resonator structures in parallel between a signal input and a signal output;
• configuring each of the plurality of acoustic resonator structures to resonate at a series resonance frequency to present a respective one of a plurality of load-line impedances at the signal input in response to receiving a respective one of a plurality of pulse voltages;
• determining a desired load-line impedance at the signal input;
• and
• applying the respective one of the plurality of pulse voltages to a selected one of the plurality of acoustic resonator structures having the respective one of the plurality of load-line impedances that is closest to the desired load-line impedance.