Second-order distortion correction method and second-order distortion correction receiver

摘要

Discloses a secondary distortion correction method and second-order distortion correction receiver may be made without requiring a complicated adjustment process, with a simple circuit configuration, to cancel the second-order distortion intermodulation with high accuracy. By performing a non-linear process with respect to the input signal, the nonlinear active element portion (110), and outputs the common-mode output signal and the differential output signal. Common mode detection unit (120), to extract the common mode output signal. By weighting a common mode output signal is extracted, the weighting unit (130) generates a correction signal. Was injected into a differential output signal a correction signal, the correction signal injection unit (140) outputs the corrected differential output signal. DC detection unit (150) calculates the average DC component of the differential output signal correction. Weight determination unit (160) determines the weighting factors by using the average DC component is used in the weighting section (130). At this time, the weight determination unit (160) is a weighting factor coefficients to zero the average DC component included in the differential output signal correction.