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A fully-digital operational transconductance amplifier (DIGOTA) architecture for tightly energy-constrained low-cost systems is presented. A 180nm DIGOTA testchip exhibits an area below the 1,000-μm2 wall, and 2.4-nW power under 150pF load, and a minimum supply voltage Vmin of 0.25 V. In the 0.3-0.5 V supply range, DIGOTA improves the areanormalized small (large) signal energy FoM by at least 836X (267X) over prior sub-500mV OTAs, while reducing area by 27-85X. The low-Vmin and nW-power features are shown to enable direct harvesting at the mm scale.

Fully-Digital Rail-to-Rail OTA with Sub-1,000 μm2 Area, 250-mV Minimum Supply and nW Power at 150-pF Load in 180nm / Pedro, Toledo; Crovetti, PAOLO STEFANO; Aiello, Orazio; Alioto, Massimo. - In: IEEE SOLID-STATE CIRCUITS LETTERS. - ISSN 2573-9603. - STAMPA. - 3:(2020), pp. 474-477. [10.1109/LSSC.2020.3027666]

Fully-Digital Rail-to-Rail OTA with Sub-1,000 μm2 Area, 250-mV Minimum Supply and nW Power at 150-pF Load in 180nm

Pedro Toledo;Paolo Crovetti;
2020

Abstract

A fully-digital operational transconductance amplifier (DIGOTA) architecture for tightly energy-constrained low-cost systems is presented. A 180nm DIGOTA testchip exhibits an area below the 1,000-μm2 wall, and 2.4-nW power under 150pF load, and a minimum supply voltage Vmin of 0.25 V. In the 0.3-0.5 V supply range, DIGOTA improves the areanormalized small (large) signal energy FoM by at least 836X (267X) over prior sub-500mV OTAs, while reducing area by 27-85X. The low-Vmin and nW-power features are shown to enable direct harvesting at the mm scale.
2020
IEEE SOLID-STATE CIRCUITS LETTERS
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2847081