| 主权项 |
1. A switching power amplifier for receiving an input signal and generating an amplified output signal across a load, the amplifier comprising:
a transformer unit comprising one transformer having a primary winding and a secondary winding; a modulator unit configured to receive an input signal, the modulator unit configured to modulate the received input signal in generating and supplying a set of one or more carrier control signals carrying the information about the input signal, the modulator unit configured to generate and supply a set of one or more waveform drive signals, the set of one or more waveform drive signals including at least one periodic waveform drive signal having a pre-set period, the modulator unit configured to generate and supply a set of one or more clamping drive signals including at least one clamping drive signal derived from the at least one periodic waveform drive signal with respect to a timing relationship there-between; a primary side unit coupled to the modulator unit and coupled to the primary winding of transformer unit, the primary side unit configured to supply power, the primary side unit configured to generate a set of one or more waveform signals using the set of one or more waveform drive signals supplied from the modulator unit, the set of one or more waveform signals driving the primary winding of the transformer unit; and a secondary side unit coupled to the modulator unit, the secondary side unit coupled to the secondary winding of the transformer unit, the secondary side unit configured to generate a set of one or more amplified periodic waveform signals upon the set of one or more waveform signals driving the primary winding of the transformer unit, the secondary side unit configured to perform, during each time interval of a series of time intervals derived from a corresponding series of cycles of the at least one periodic waveform drive signal, an active clamping operation with respect to the set of one or more amplified periodic waveform signals, the active clamping operation performed using the set of one or more clamping drive signals supplied from the modulator unit, the active clamp operation causing the secondary side unit to absorb excess energy associated with ringing and voltage spikes otherwise included in the set of one or more amplified periodic waveform signals and discharge the absorbed excess energy so that the ringing and voltage spikes are largely absent in the set of one or more amplified periodic waveform signals, at least one portion of the discharged energy returning back to the primary side unit through the transformer unit, the secondary side unit configured to generate an amplified output signal across a load using the set of one or more amplified periodic waveform signals and the set of one or more carrier control signals received from the modulator unit, the amplified output signal being an amplified replica of the input signal. |
