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An ultra low power frequency reference for timekeeping applications

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dc.contributor.advisor Mayaram, Kartikeya
dc.contributor.advisor Fiez, Terri S.
dc.creator Oporta, Hector Ivan
dc.date.accessioned 2009-04-01T23:19:19Z
dc.date.available 2009-04-01T23:19:19Z
dc.date.copyright 2008-12-17
dc.date.issued 2009-04-01T23:19:19Z
dc.identifier.uri http://hdl.handle.net/1957/11161
dc.description Graduation date: 2009 en_US
dc.description.abstract An ultra low power crystal oscillator that provides a frequency reference for battery powered timekeeping applications is presented. An amplitude control circuit is employed to ensure that minimum current is consumed. A subthreshold voltage regulator provides a supply voltage for the oscillator with minimum current consumption. The oscillator and regulator are designed in a standard 0.18μm CMOS process. Measured results show the regulator works for battery voltages that range from 1.4 - 4.5V. The crystal oscillator consumes a current of 17.6nA at a minimum supply voltage of 0.8V, making it the lowest power crystal oscillator demonstrated to date. The complete system (oscillator and regulator) consumes a current of 30.6nA when a supply voltage of 3.3V is used. en_US
dc.language.iso en_US en_US
dc.subject Low en_US
dc.subject Power en_US
dc.subject.lcsh Low voltage systems en_US
dc.subject.lcsh Oscillators, Crystal en_US
dc.title An ultra low power frequency reference for timekeeping applications en_US
dc.type Thesis en_US
dc.degree.name Master of Science (M.S.) in Electrical and Computer Engineering en_US
dc.degree.level Master's en_US
dc.degree.discipline Engineering en_US
dc.degree.grantor Oregon State University en_US
dc.contributor.committeemember Mayaram, Kartikeya
dc.contributor.committeemember Fiez, Terri S.
dc.contributor.committeemember Liu, Huaping
dc.contributor.committeemember Pavol, Mike

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