pls help me to download the following paper,thx:
1:A 14b 40MS/s Redundant SAR ADC with 480MHz Clock in 0.13pm CMOS
2:an 820uW 9b 40MS/s Noise Tolerant Dynamic-SAR ADC in 90nm Digital CMOS 3:A 65fJ/Conversion-Step 0-to-50MS/s 0-to-0.7mW 9b Charge-Sharing SAR ADC in 90nm Digital CMOS