Portable device using location determination and MEMS timekeeping to update and keep time

Abstract

Devices and methods for determining a current location using a location detection element, determining a local time zone based on the current location using a memory unit, keeping time using a micro-electro-mechanical-system (MEMS) oscillator unit co-fabricated on a common substrate with the location detection element, and determining a local time based on the local time zone using a controller element. Optional embodiments comprise a MEMS oscillator unit that is fabricated underneath, next to, or on top of the location detection element. Additional embodiments comprise a GPS chip optionally assisted by a cell phone chipset or FM receiver to enhance location and time determination. Optional embodiments may additionally enter a power conservation mode after the current location has been determined, or may detect air travel to disable the location detection element and enable the location detection element upon detected landing.

Dependencies are inferred from the claim text.