题目/Title：A low-power DC offset calibration method independent of IF gain for zero-IF receiver

作者/Author：
                        Jingjing Dong,Hanjun Jiang,Lingwei Zhang,Jianjun Wei,Fule Li,Chun Zhang,ZhiHua Wang

期刊/Journal：Science China-Information Sciences

年份/Issue Date：2014Oct.

卷（期）及页码/Volume（No.）&pages：Vol.57, No.10, pp 1 - 10

摘要/Abstract：
A novel low-power DC offset calibration (DCOC) method independent of intermediate frequency (IF) gain for zero-IF receiver applications has been reported. The conventional analog DCOC method consumes greater power and affects the performance of the receiver. The conventional mixed-signal method requires enhanced memory to store the calibration results at different receiver gains as the DC offset is relative to the radio frequency (RF) and IF gain. A novel algorithm is presented to make the DCOC process independent of IF gain, which significantly reduces the memory area. With the proposed circuit, the receiver calibrates only once so settle-time and power consumption of the IF circuit is lowered. A DCOC circuit with the proposed method is manufactured in 0.18 μm CMOS technology that drains nearly 0 mA equivalent current from a 1.8 V power supply.