Title :
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
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;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2013.2278344
