CMOS power amplifier efficiency is improved harmonics decreases

摘要

CMOS Class F amplifier eliminates the need for a circuit that is tuned to the second harmonic wave by removing the even-order harmonics with a differential input. This also minimizes the design sensitivity to changes in the component values ​​of the specific selected for the circuit that is tuned and / or the second harmonic frequency. Third harmonic is reduced by controlling the phase relationship between differential input between. Greater efficiency is achieved by controlling dynamically as a function of output power levels the impedance of the amplifier.