A dynamic threshold voltage MOSFET (DTMOS) for very low voltage operation

Abstract
A new mode of operation for Silicon-On-Insulator (SOI) MOSFET is experimentally investigated. This mode gives rise to a Dynamic Threshold voltage MOSFET (DTMOS). DTMOS threshold voltage drops as gate voltage is raised, resulting in a much higher current drive than regular MOSFET at low V/sub dd/. On the other hand, V/sub t/ is high at V/sub gs/=0, thus the leakage current is low. Suitability of this device for ultra low voltage operation is demonstrated by ring oscillator performance down to V/sub dd/=0.5 V.

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