A switching power amplifier, the amplifier comprising:
- a transformer unit comprising a set of one or more switching transformers each having a respective pair of a primary winding and a secondary winding with the respective primary and secondary windings corresponding to each other;
- a modulator unit configured to receive an input signal, the modulator unit configured to modulate the received input signal in generating and supplying at least one set of one or more switching drive signals carrying information about the input signal and one set of one or more switching control signals carrying information about the input signal;
- a primary side unit coupled to the modulator unit and coupled to the respective primary winding of each transformer of the transformer unit, the primary side unit comprising a power supply function configured to supply power, the primary side unit configured to generate, for the set of one or more transformers of the transformer unit, a set of one or more transformer-driving switching carrier signals driving the respective one or more primary windings, the set of one or more transformer-driving switching carrier signals carrying information about the input signal and generated using the set of one or more switching drive signals supplied from the modulator unit;
- and
- a secondary side unit coupled to the modulator unit and coupled to the respective secondary winding of each transformer of the transformer unit, the secondary side unit configured to generate, for the set of one or more transformers of the transformer unit, one set of one or more amplified switching carrier signals at one corresponding set of one or more terminals of the respective one or more secondary windings upon the set of one or more transformer-driving switching carrier signals respectively driving the respective one or more primary windings, the set of one or more amplified switching carrier signals carrying information about the input signal, the secondary side unit configured to demodulate, under the control of the set of one or more switching control signals supplied from the modulator unit, the set of one or more amplified switching carrier signals to generate an amplified output signal across a load with the amplified output signal being an amplified replica of the input signal, the secondary side unit configured, for the set of one or more transformers of the transformer unit, to capture power returning from the load through the respective one or more secondary windings and flow the captured return power from the respective one or more secondary windings to respective one or more recirculation circuits configured to recirculate the captured return power to a destination power supply unit configured to store and recirculate power.