Title :
A practical integrated 1.5-bit MDAC for pipeline ADCs
Author :
Rongbin Hu ; Jingqiang Hu ; Xiaoying Zhang ; Kun Liu
Author_Institution :
Sci. & Technol. on Analog Integrated Circuit Lab., Chongqing, China
Abstract :
A practical integrated 1.5-bit MDAC is introduced which can be used in a pipeline ADC to improve its performances. The MDAC is implemented in a full differential switch-capacitor circuit, which includes a gain-boost amplifier, boot-strapped switches, and pre-amplifying latching comparators. Because of the elaborate design, the MDAC can tolerate the offset of the comparators as high as 1/2LSB with respect to the current stage. The simulated results show that the MDAC achieves a sampling rate of 200MHz with SNR of 76dB and SFDR of 81dB, while consuming only 10.1mW.
Keywords :
amplifiers; analogue-digital conversion; comparators (circuits); digital-analogue conversion; multiplying circuits; switches; MDAC; boot-strapped switches; frequency 200 MHz; full differential switch-capacitor circuit; gain-boost amplifier; pipeline ADC; power 10.1 mW; preamplifying latching comparators; word length 1.5 bit; Latches; Pipelines; Preamplifiers; Signal to noise ratio; Solid state circuits; Switching circuits;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929328
