On the Minimum Supply Voltage for MOSFET Oscillators

Author

Bender Machado, Marcio ; Cherem Schneider, Marcio ; Galup-Montoro, Carlos

Author_Institution

Lab. de circuitos integrados, UFSC, Florianopolis, Brazil

Volume

61

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

347

Lastpage

357

Abstract

In order to investigate the minimum supply voltage for MOSFET oscillators, three topologies were studied. Two of them, namely the enhanced swing inductive-load ring and the enhanced swing Colpitts oscillators, can operate with supply voltages below the thermal voltage. Simplified theoretical expressions for the minimum supply voltage of the oscillators were derived. Measurement results obtained using prototypes built with zero-VT transistors and high-quality-factor inductors confirmed the operation of one of the oscillators down to a supply voltage below 5 mV.

Keywords

MOSFET; inductors; oscillators; MOSFET oscillator; enhanced swing Colpitts oscillator; enhanced swing inductive-load ring; high-quality-factor inductor; minimum supply voltage; thermal voltage; zero-VT transistor; CMOS integrated circuits; Inductors; Integrated circuit modeling; MOSFET; Ring oscillators; Fundamental limitations in MOS technology; MOSFET ultra-low voltage analog circuits; minimum supply voltage; ultra-low-voltage Colpitts oscillator; ultra-low-voltage circuits; ultra-low-voltage ring oscillators; zero-VT transistors;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2013.2278344

Filename

6583254