Abstract: In certain examples, the disclosure involves or is directed to a circuit-based apparatus that has a T-network, and a plurality of circuit paths with a first path having a first switching node to respond to an RF input signal that is characterized by a first phase, and with a second path having a second switching node to respond to the RF input signal characterized by a second phase that is different than the first phase. The circuit paths may be configured as a push-pull amplification circuit. The T-network may be arranged between the first and second switching nodes and may include a variable impedance circuit. The variable impedance circuit may be adjusted, in accordance with a selected frequency of the RF input signal. The T-network may be characterized by a resonance frequency shunts a second harmonic current associated with the resonance frequency, thereby permitting for use of different selected frequencies.

Abstract: In certain examples, the disclosure involves or is directed to a circuit-based apparatus that has a T-network, and a plurality of circuit paths with a first path having a first switching node to respond to an RF input signal that is characterized by a first phase, and with a second path having a second switching node to respond to the RF input signal characterized by a second phase that is different than the first phase. The circuit paths may be configured as a push-pull amplification circuit. The T-network may be arranged between the first and second switching nodes and may include a variable impedance circuit. The variable impedance circuit may be adjusted, in accordance with a selected frequency of the RF input signal. The T-network may be characterized by a resonance frequency shunts a second harmonic current associated with the resonance frequency, thereby permitting for use of different selected frequencies.