Title :
Analysis and design of ultra-low-voltage inductive ring oscillators for energy-harvesting applications
Author :
Machado, M.B. ; Schneider, M.C. ; Galup-Montoro, Carlos
Author_Institution :
UFSC-Univ. Fed. de Santa Catarina, Florianopolis, Brazil
fDate :
Feb. 27 2013-March 1 2013
Abstract :
This paper presents inductive ring oscillators that operate from supply voltages of around two times the thermal voltage (2kT/q), for energy-harvesting applications. Expressions for the oscillation frequency as well as the minimum transistor gain and supply voltage required for the start-up oscillations are derived. The ring oscillators were built with zero-VT transistors due to their high drive capability at low voltages. Measurement results obtained in a ring oscillator prototype integrated in a 130 nm technology confirmed operation of the oscillator with 53 mV of supply voltage.
Keywords :
energy harvesting; oscillators; transistors; energy-harvesting applications; minimum transistor gain; oscillation frequency; start-up oscillations; supply voltage; thermal voltage; ultralow-voltage inductive ring oscillators; voltage 53 mV; zero-VT transistors; Energy harvesting; Inductors; MOSFET; Ring oscillators; Topology; MOSFET analog circuits; energy harvesting; ring oscillator; ultra-low-voltage; zero-VT transistor;
Conference_Titel :
Circuits and Systems (LASCAS), 2013 IEEE Fourth Latin American Symposium on
Conference_Location :
Cusco
Print_ISBN :
978-1-4673-4897-3
DOI :
10.1109/LASCAS.2013.6518995
