CPC H03F 1/0288 (2013.01) [H03F 3/211 (2013.01); H03F 2200/387 (2013.01); H03F 2200/451 (2013.01)] | 20 Claims |
1. A Doherty amplifier comprising:
an RF coupler;
a main amplifier coupled to a first port of the RF coupler;
a two-stage peaking amplifier coupled to a second port of the RF coupler, wherein the two-stage peaking amplifier is biased to delay a transition from an off to an on state to within at least 6 dB of a power compression point of the main amplifier; and
a combining node coupled to an output port from the main amplifier and an output port from the two-stage peaking amplifier.
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