2 3 / CLASS A/F AMPLIFIER HAVING SECOND AND THIRD ORDER HARMONIC INPUT AND OUTPUT FILTERING AND SELF BIAS DISTORTION CORRECTION

摘要

The new class A / F amplifiers include input filtering and matching circuits, summing junctions, amplification circuits, filtering and feedback biasing circuits, and output filtering and matching circuits. The input filtering and matching circuit provides a filtered and matched radio frequency access input signal in response to the radio frequency access input signal. The summing junction provides a summed, filtered, matched and fed back radio frequency access input signal in response to the filtered and matched radio frequency access input signal and also in response to a filtered and feedback bias signal. The amplifying circuit provides an amplified, summed, filtered, matched and fed back radio frequency access input signal in response to the summed, filtered, matched and fed back radio frequency access input signal. The feedback and filtering bias circuitry provides a feedback and filtering bias signal in response to the amplified, summed, filtered, matched and fed back radio frequency access input signal. The output filtering and matching circuit provides an amplified, summed, filtered, matched and fed back radio frequency access output signal 24 in response to the amplified, summed, filtered, matched and fed back radio frequency access input signal. The class A / F amplifier substantially reduces harmonics that cause power interference between adjacent channels in radio frequency signals, thereby significantly reducing call failures and enabling enhanced mobile communication services with a wider call range.