DC offset correction device and method

A DC offset correction device which applies a feedback type DC offset correction to radio communication equipment for performing orthogonal modulation by a direct RF modulation method and which comprises a DC offset correction unit for adding a DC offset correction value to its input signal and outputting it to an orthogonal modulator side, comprising:

• a fixed value setting unit for setting a value for outputting a non-modulation signal with a specific phase from the modulator;
• a non-modulation signal switch unit for switching between a main signal and the value set by the fixed value setting unit and outputting it;
• and
• a DC offset correction control unit for sequentially changing the specific phase of the non-modulation signal outputted from the modulator by sequentially changing the value set by the fixed value setting unit and operating the DC offset correction value to be added to the input signal by the DC offset correction unit, based on the summed value of a plurality of pieces of feedback signal data generated from the non-modulation signal whose phase has been sequentially changed.