Journal
2021 19TH IEEE INTERNATIONAL NEW CIRCUITS AND SYSTEMS CONFERENCE (NEWCAS)
Volume -, Issue -, Pages -Publisher
IEEE
DOI: 10.1109/NEWCAS50681.2021.9462749
Keywords
Temperature dependence; standard cell-based; technology portable; low design effort; low area Dynamic comparator; fully-synthesiz able; ultra-low voltage; ultra-low power; sensor nodes; Internet of Things
Funding
- Singapore National Research Foundation [NRF-CRP20-2017-0003]
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This paper discusses the performance/temperature tradeoff in an ultra-low voltage, ultra-low power rail-to-rail dynamic voltage comparator made solely by digital standard cells. Measurements show correct operation under rail-to-rail common-mode input at a supply voltage ranging from 0.6V down to 0.15V, with performance trade-offs observed under temperature variations.
This paper deals with the performance/temperature tradeoff in an ultra-low voltage, ultra-low power rail-to-rail dynamic voltage comparator made solely by digital standard cells. The digital nature of the comparator makes its design technology portable also enabling its operation at very low supply voltages down to deep sub-threshold. In particular, as sub-threshold circuits have a significant temperature dependence, this paper focuses on the comparator performance under different supply voltages and temperatures. Measurements performed on a 180nm testchip show correct operation under rail-to-rail common-mode input at a supply voltage ranging from 0.6V down to 0.15V. Moreover, the measurements under temperature variations of offset, clock-to-output delay, and power in the range from -25 degrees C to 75 degrees C show the respective performance trade-offs.
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