| 摘要 |
The object of this invention is to reduce the cost of an amplification device that has a distortion detection loop that uses an amplifier to amplify the signal subject to amplification and detect the 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. This object is achieved by a configuration wherein the distortion detection loop consists of a first digital modulation means that, among two branches of a digital baseband signal subject to amplification that is divided into two, uses one branch of the signal to modulate a carrier signal, an amplifier that amplifies this modulated signal, delay means that delays the other branch of the digital baseband signal, a second digital modulation means that uses the delayed signal to modulate a carrier signal, phase-change means that changes the phase of the modulated signal and distortion detection means that detects the distortion arising in the amplifier from the amplified signal and the phase-changed modulated signal.
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