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1-bit quantiser with rail to rail input range for sub-1 V ΔΣ modulators

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2 Author(s)
M. Maymandi-Nejad ; Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Canada ; M. Sachdev

A new, fully differential comparator with rail to rail input range is presented. This comparator can be used as a 1-bit quantiser in sub-1 V ΔΣ modulators. The quantiser is laid out in 0.18 μm CMOS technology. The post-layout simulation results show that the quantiser is capable of working at 10 MHz with 10 μV resolution. This quantiser is successfully used in 0.8 V first-order and second-order fully differential ΔΣ modulators.

Published in:

Electronics Letters  (Volume:39 ,  Issue: 12 )