Feed forward compensation using phase and time modulation

Details Feed forward compensation using phase and time modulation Feed forward compensation using phase and time modulation

H - Electricity

03

F

H03F 1/32 (2006.01)

Patent

CA 2289396

The invention relates to a low cost feed forward RF power amplifier arrangement for amplifying an RF input signal using a main power amplifier operating as a Class AB amplifier. The method and apparatus modify the input signal to the main amplifier to compensate for the distortion added by the main power amplifier. The circuit provides for injecting a pilot signal prior to the Class AB amplifier and adjusting the correction circuitry of the amplifier based on a quadrature modulated, chopped derivative of the injected pilot signal.

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