An accurate track-and-latch comparator

IEICE Electronics Express

K. D. Sadeghipour¹ 

[1] University of Tabriz

关键词: latch comparator;    offset cancellation;    low offset;    negative resistance;    high speed;   

DOI  :  10.1587/elex.9.808

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)In this paper, a new accurate track and latch comparator circuit is presented. The Offset voltage of latch is compensated by negative feedback loop and the low offset voltage is achieved without pre-amplifiers. The pull up devices in modified regeneration latch is turned off to reduce quiescent current of comparator within the tracking phase. The Monte-Carlo simulation results for the designed comparator in 0.18µm CMOS process show that equivalent input referred offset voltage is 200µV at 1 sigma while it was 26mV at 1 sigma before offset cancellation. The comparator dissipates 400µW from a 1.8V supply while operates in 500MHz clock frequency. The power consumption improvement is up to 33% over previously reported structure.

【 授权许可】

Unknown