On the Minimum Supply Voltage for MOSFET Oscillators

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 express...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2014-02, Vol.61 (2), p.347-357
Main Authors: Bender Machado, Marcio, Cherem Schneider, Marcio, Galup-Montoro, Carlos
Format: Article
Language:English
Subjects:
Circuits
CMOS integrated circuits
Electric potential
Fundamental limitations in MOS technology
Inductors
Integrated circuit modeling
minimum supply voltage
MOSFET
MOSFET ultra-low voltage analog circuits
MOSFETs
Oscillators
Ring oscillators
Swing
Topology
ultra-low-voltage circuits
ultra-low-voltage Colpitts oscillator
ultra-low-voltage ring oscillators
Voltage
zero-VT transistors
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Summary: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.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2013.2278344