CMOS dynamic comparators for pipeline A/D converters

L Sumanen, M Waltari, V Hakkarainen… - … on Circuits and …, 2002 - ieeexplore.ieee.org
L Sumanen, M Waltari, V Hakkarainen, K Halonen
2002 IEEE International Symposium on Circuits and Systems …, 2002ieeexplore.ieee.org
Three different CMOS dynamic comparator topologies for pipeline A/D converters, resistive
divider, differential pair, and charge distribution comparators, are analyzed. The topologies
considered are fully differential, ie both sensing and reference voltage inputs are balanced,
consist only of a single stage, and feature zero DC power dissipation with a built-in threshold
adjusting input stage. Test structures of the comparators, fabricated in 0.35-/spl mu/m CMOS
process, are measured to determine the offset properties of the compared topologies.
Three different CMOS dynamic comparator topologies for pipeline A/D converters, resistive divider, differential pair, and charge distribution comparators, are analyzed. The topologies considered are fully differential, i.e. both sensing and reference voltage inputs are balanced, consist only of a single stage, and feature zero DC power dissipation with a built-in threshold adjusting input stage. Test structures of the comparators, fabricated in 0.35-/spl mu/m CMOS process, are measured to determine the offset properties of the compared topologies.
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