The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2006
Filed:
Nov. 29, 2005
Jia-horng Shieh, Chunghe, TW;
Jia-Horng Shieh, Chunghe, TW;
Mediatek Inc., Hsinchu, TW;
Abstract
A GPS receiver device comprises a receiver, an oscillator, a memory unit, a temperature sensor, and a processor. The oscillator generates frequency with drift errors occurring at a variety of different temperatures. The memory unit stores coefficients of a plurality of polynomial equations. Each polynomial equation fits a temperature range versus corresponding drift errors. The temperature sensor detects ambient temperature of the receiver. The processor determines which temperature range the ambient temperature belongs to, reads the coefficients of the corresponding polynomial equation from the memory unit according to the determined temperature range, and calculates the drift error of the oscillator at the ambient temperature.