Title :
A wide-range and high-precision real-time calibration for dynamic comparator
Author :
Tao Lin ; Mingshuo Wang ; Weiru Gu ; Fan Ye ; Jun Xu ; Junyan Ren
Author_Institution :
Dept. of Microelectron., Fudan Univ., Shanghai, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
In this paper, a high-precision and high-linearity calibration is introduced for dynamic comparator offset using I-MOS capacitors. After calibration, the offset can be reduced from 29.9 mV to 66 μV (one sigma) at 2GHz working clock. Simulation results show that the SFDR and the SNDR can be improved 20dB in a case of 12bit 50MS/s successive approximation analog to digital converter (SAR ADC) with the proposed calibration method at the expense of 30 μW power consumption.
Keywords :
MOS capacitors; UHF circuits; analogue-digital conversion; calibration; comparators (circuits); I-MOS capacitor; SAR ADC; calibration; dynamic comparator offset; frequency 2 GHz; noise figure 20 dB; power 30 muW; power consumption; successive approximation analog to digital converter; voltage 29.9 mV to 66 muV; word length 12 bit;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467892
