Patent ID: 6801083
Filing Date: 2004-10-05
Classification: H03F

Abstract:
A feedforward amplifier that inputs a plurality of signal groups, each having a different frequency bandwidth respectively, and that in a distortion detection loop uses a main amplifier to amplify this plurality of input signal groups and detect the distortion arising in said main amplifier, and in a distortion compensation loop removes the distortion detected in the distortion detection loop from the amplified signal from said main amplifier, whereinthe feedforward amplifier is such that: the distortion compensation loop has the same number of distortion amplification systems as the number of input signal groups that use an auxiliary amplifier to amplify distortion in each input signal group that contains distortion detected by the distortion detection loop, and that removes the sum total of the distortion of each input signal group amplified by this plurality of distortion amplification systems from the amplified signal from the main amplifier.