A feedforward linearizer for amplifying an input signal comprises a signal cancellation circuit which has a first branch and a second branch. A first amplifier provided in the first branch receives the input signal intended to be amplified and generates an output signal received by a signal cancellation...http://www.google.com.tw/patents/US6154093?utm_source=gb-gplus-share專利 US6154093 - Fast adaptive wideband power amplifier feed forward linearizer using a RLS parameter tracking algorithm
