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Arabian Journal for Science and Engineering

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25-05-2019 | Research Article -Electrical Engineering

A New pW CMOS Sub-Hertz Timer

Authors: Hamza Shahid, Hussain Alzaher

Published in: Arabian Journal for Science and Engineering | Issue 3/2020

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Abstract

A low-voltage and ultra-low power sub-Hertz timer using transistor operating in sub-threshold region is proposed. The sub-Hertz operation is achieved by controlling the amount of currents charging and discharging the timer’s capacitor instead of using large passive components. Pulse width modulation is accomplished by sizing the transistors in charging and discharging control blocks. The timer is working from a single supply voltage of as low as 0.4 V. The circuit is designed in a standard CMOS 150 nm and simulated using Cadence. Simulation results show an oscillation frequency of as low as 0.0217 Hz (a period of 46 s) while using integrable capacitor (100 pF). Its average power consumption for one period is 13.91 pW.

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Title: A New pW CMOS Sub-Hertz Timer
Authors: Hamza Shahid
Hussain Alzaher
Publication date: 25-05-2019
Publisher: Springer Berlin Heidelberg
Published in: Arabian Journal for Science and Engineering / Issue 3/2020
Print ISSN: 2193-567X
Electronic ISSN: 2191-4281
DOI: https://doi.org/10.1007/s13369-019-03928-1

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