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An event-driven, alias-free ADC with signal-dependent resolution

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2 Author(s)
Weltin-Wu, C. ; Columbia Univ., New York, NY, USA ; Tsividis, Y.

A clockless 8b ADC in 130nm CMOS uses a time-varying comparison window to dynamically vary resolution, and input-dependent dynamic bias, to maintain SNDR while saving power. Alias-free operation with SNDR in the range of 47-54dB, which partly exceeds the theoretical limit of 8b conventional converters, is achieved over a 20kHz bandwidth with 3-9μW power from a 0.8V supply.

Published in:

VLSI Circuits (VLSIC), 2012 Symposium on

Date of Conference:

13-15 June 2012