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Title: Picowatt-Power Analog Gain Stages in Super-Cutoff Region With Purely-Harvested Demonstration
Authors: Joydeep Basu 
Karim Ali Abdeltawwab Ahmed 
Longyang Lin 
Massimo Bruno Alioto 
Issue Date: 1-Sep-2022
Citation: Joydeep Basu, Karim Ali Abdeltawwab Ahmed, Longyang Lin, Massimo Bruno Alioto (2022-09-01). Picowatt-Power Analog Gain Stages in Super-Cutoff Region With Purely-Harvested Demonstration. ScholarBank@NUS Repository.
Abstract: In this work, gain stages with power down to the sub-pW/stage range are introduced to enable always-on mm-scale systems based on either pure harvesting across all practical environmental conditions, or micro-battery with near-shelf life lifetime (e.g., 20 years). The proposed circuit techniques suppress the need for supply voltage regulation, allowing direct harvesting (i.e., no intermediate dc–dc conversion). A CMOS 180-nm fully differential operational transconductance amplifier (OTA) is shown to consume 0.43–1.26 pW at 0.4–0.6 V as voltage harvested across all practical conditions from 2.16-mm2 solar cell down to 1 lux. The OTA shows 0.8-mV input offset and 18- μV input-referred noise. As an example of its application, a pW-power human grip/touch detection system for always-on event monitoring is demonstrated at light-harvesting down to moonlight.
DOI: 10.1109/LSSC.2022.3203693
Appears in Collections:Staff Publications

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