A low-noise self-calibrating dynamic comparator for high-speed ADCs
不过0.5V应该没法做电流源的电荷泵,建议用下面这篇
A 3.1 mW 8b 1.2 GS/s Single-Channel Asynchronous SAR ADC With Alternate Comparators for Enhanced Speed in 32 nm Digital SOI CMOS
用开关电容电荷泵可能更适合低电源电压,或者搞点花哨的开关电容
A Time-Interleaved SAR ADC With Bypass-Based Opportunistic Adaptive Calibration