Actively Tuned Circuit Having Parallel Carrier and Peaking Paths

A circuit (e.g., 400) comprising:

• a power splitter (e.g., 410) configured to split an input signal (e.g., 405) into first and second signals;
• a carrier amplifier path (e.g., 420) configured to receive the first signal from the power splitter, the carrier amplifier path comprising a first variable phase shifter (e.g., 421) in series with a carrier amplifier (e.g., 423), wherein:
• the first variable phase shifter applies a first phase shift to the first signal;
• and
• the carrier amplifier amplifies the first signal;
• a peaking amplifier path configured to receive the second signal from the power splitter, the peaking amplifier path comprising a second variable phase shifter (e.g., 431) in series with a peaking amplifier (e.g., 434), wherein:
• the second variable phase shifter applies a second phase shift to the second signal;
• and
• the peaking amplifier amplifies the second signal;
• a power combiner (e.g., 440) configured to combine signals generated by the carrier and peaking amplifier paths to provide an output signal;
• and
• control circuitry (e.g., 460) configured to control the first and second phase shifts applied by the first and second phase shifters to the first and second signals, respectively.