A low power mixed signal DC offset calibration circuit for direct conversion receiver applications

A low power mixed signal DC offset calibration(DCOC) circuit for direct conversion receiver applications is designed.The proposed DCOC circuit features low power consumption,fast settling time and a small die area by avoiding the trade-off between loop response time and the high pass frequency of the DCOC servo loop in conventional analog DCOC systems.By applying the proposed DC offset correction circuitry,the output residue DC offset voltages are reduced to less than 38 mV and the DCOC loop settling time i...