公开(公告)号：EP3637618A1

公开(公告)日：2020-04-15

申请号：EP19202069.1

申请日：2019-10-08

申请人： MEDIATEK INC.

发明人： LIN, Ying-Zu ,  LIN, Chin-Y ,  TSAI, Chihhou ,  TSOU, Shan-Chih ,  HSIN, Lu Chao

IPC分类号： H03M1/08 ,  H03M1/46

摘要： A noise-shaping successive approximation analog-to-digital converter (NS-SAR ADC) using a passive noise-shaping technique with 1-input-pair SAR comparator is introduced. A residue sampling and integration circuit is coupled between a DAC and the comparator, for sampling a residue voltage generated by the DAC and charge-sharing of the sampled residue voltage. A first integral capacitor is coupled between a first input terminal of a comparator and a first output terminal of a DAC. After a first residue capacitor samples a residue generated by the DAC, the first residue capacitor is coupled to the first integral capacitor for charge-sharing of the residue voltage.