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

fYear

2013

fDate

Feb. 27 2013-March 1 2013

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (LASCAS), 2013 IEEE Fourth Latin American Symposium on

Conference_Location

Cusco

Print_ISBN

978-1-4673-4897-3

Type

conf

DOI

10.1109/LASCAS.2013.6518995

Filename

6518995