| 摘要 |
A switching amplifier employs a plurality of independent output stages in a bridged configuration, with each output stage presenting the product of an independent duty cycle and two or more static of dynamic reference voltages, currents or powers to a single terminal of a common output load. A plurality of electrically controlled switches (207, 208, 209, 210, 211, 212) interconnect the references to the load (218), with a waveform generator (22 0) controlling the switches for a coarse and fine control of power to the load. The waveform generator preferably uses pulse-code modulation (PCM), though t he invention is not limited in this regard, and is applicable to any modulation scheme or waveform suitable to sequence the electrically controlled switches . The load is preferably filtered on either side, and return paths for the pow er supplies (i.e., ground) are connected through separate switches to the load through the filters (213, 214, 215, 216, 217). The amplifier may be used for audio or other applications benefitting from the design.
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