Offset correction device and method

Details Offset correction device and method Offset correction device and method

2011-03-22

2011-03-22

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C330S009000, C375S319000

Reexamination Certificate

active

07911254

ABSTRACT:
A direct-current-offset correction device includes a digital-to-analog converter that converts a digital signal into an analog signal, a modulator that modulates the analog signal to generate a modulated signal, a direct-current-offset correction value calculation unit that calculates a direct-current-offset correction value as a reverse characteristic component of a carrier leak occurring in the modulated signal based on a demodulated signal which is demodulated by feeding back the modulated signal, a direct-current-offset correction unit that corrects a direct-current-offset on the digital signal based on the direct-current-offset correction value, a correction value detection unit that detects whether or not the direct-current-offset correction value is zero or a neighboring value of zero, and an offset generation unit that superimposes a direct-current-offset component on the analog signal based on a detection result of the correction value detection unit.

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