Patent ID: 6819174
Filing Date: 2004-11-16
Classification: H03F

Abstract:
An amplification device having a distortion detection loop that uses an amplifier to amplify a signal subject to amplification and detect a distortion arising in said amplifier, and a distortion removal loop that removes the distortion detected by the distortion detection loop from the signal amplified by said amplifier, wherein:the distortion detection loop comprises: a first modulation means that, among two branches of a baseband signal subject to amplification that is divided into two, uses one branch of the baseband signal to modulate a carrier signal; an amplifier that amplifies the modulated signal obtained from the first modulation means; delay means that delays the other branch of the baseband signal; a second modulation means that uses the other branch of the baseband signal delayed by the delay means to modulate a carrier signal; and distortion detection means that detects the distortion arising in said amplifier from the signal amplified by the amplifier and the modulated signal obtained from the second modulation means.