Devices and methods involving power-amplification architecture using t-network

An apparatus comprising:

• push-pull amplification circuitry to be driven at one or more selected frequencies by out-of-phase input signals;
• and
• a T-network, coupled to the push-pull amplification circuitry, including a variable impedance circuit to be adjusted in accordance with the one or more selected frequencies, for a resonance frequency of the T-network to shunt a second harmonic current associated with the resonance frequency.

A circuit amplification method for use with push-pull amplification circuitry having a T-network coupled to the push-pull amplification circuitry, the method comprising:

• driving the push-pull amplification circuitry at one or more selected frequencies by out-of-phase input signals;
• and
• adjusting or changing a variable impedance circuit as part of the T-network to alter, in accordance with the one or more selected frequencies, a resonance frequency associated with the T-network and cause a second harmonic current associated with the resonance frequency to be shunted.