| 摘要 |
A method and apparatus for efficient power amplification of a wideband signal with a correspondingly wide modulation bandwidth includes splitting means (110), class-G amplifier/modulator (120), and power amplifier (130). Three-level class-G amplifier/modulator (200, FIG. 2) comprises operational amplifier circuits (215, 225), three-state selection circuit (209), switch driver circuit (219), drive signal routing circuit (216), power stage circuit (217), and filter network (218). Multiple power stages are multiplexed based on the amplitude of the envelope signal.
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