Linearizing technique for power amplifiers

Details Linearizing technique for power amplifiers Linearizing technique for power amplifiers

H - Electricity

03

G

H03G 3/20 (2006.01) G01S 7/03 (2006.01) H03G 1/04 (2006.01) H04B 1/04 (2006.01)

Patent

CA 2668264

Embodiments described herein relate to amplification circuits. In some embodiments the amplification circuit includes a power amplifier, a feedforward error compensation loop, and phase feedback and amplitude feedback error compensation loops nested within the feedforward loop. The two nested feedback loops provide a "pre-cleaning" action, which reduces the amount of rejection required in the feedforward loop. In some embodiments, the amplification circuit includes a power amplifier and an enhanced feedforward loop comprising a phase control circuit that maintains a phase balance needed to reduce distortion in the output signal of the amplification circuit. In some embodiments, the amplification circuit includes a power amplifier, a feedforward error compensation loop, and phase feedback and amplitude feedback error compensation loops nested within the feedforward loop and the feedforward loop comprises the phase control circuit.

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