Envelope amplifier

Details Envelope amplifier Envelope amplifier

H - Electricity

03

F

330/12, 330/15,

H03F 3/217 (2006.01) H03F 1/02 (2006.01) H03F 3/189 (2006.01) H03F 3/38 (2006.01)

Patent

CA 1286734

ABSTRACT OF THE DISCLOSURE A high efficiency envelope amplifier (20) is disclosed, The invention includes a power supply (24), a comparator (60), and several switches (26-38). The power supply (24) is capable of providing multiple outputs. The comparator (60) measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range, a selected power supply output is switched onto the output path. Since the present invention incrementally switches small amounts of power, switching losses are substantially mitigated.

568797

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