Patent ID: 6091296
Filing Date: 2000-07-18
Classification: H03F

Abstract:
For use in a transmitter in a wireless network, a single-loop feedforward amplification system comprising:a first branch of said single-loop feedforward amplification system comprising a power amplifier capable of receiving an input signal and generating an amplified output signal from said input signal;a second branch of said single-loop feedforward amplification system comprising distortion correction circuitry capable of receiving said input signal and generating a correction signal capable of at least partially canceling a distortion signal introduced into said amplified output signal by said power amplifier in said first branch of said single-loop feedforward amplification system, wherein said second branch generates said correction signal whenever said input signal increases above a maximum input level capable of causing said power amplifier to enter saturation; anda combiner circuit within said single-loop feedforward amplification system capable of combining said amplified output signal and said correction signal to thereby at least partially cancel said distortion signal.