Patent ID: 6229391
Filing Date: 2001-05-08
Classification: H03F

Abstract:
An adaptation method used in an amplifier arrangement, the method comprising amplifying a signal entering the arrangement in a feedforward manner and using complex factors .alpha. and .beta., which are adapted in order to adjust the phase and amplitude of the input signal to the amplifier arrangement, characterized byadapting complex factor a by attenuating an amplified signal, by supplying part of a signal entering the arrangement for adaptation, and by controlling adaptation of complex factor .alpha. with part of the signal whose phase and amplitude are adapted, by subtracting the attenuated signal from the signal adapted by complex factor .alpha.,adapting complex factor .beta. by forming a predetermined signal, which is added to the amplified signal, by forming a conjugate signal of the signal adapted by complex factor .beta. and by multiplying it by the predetermined signal, by adapting factor .beta. by the signal obtained as a result of multiplication, factor .beta. being used for adapting the phase and amplitude of the formed sum signal.