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:
Oct. 30, 2001
Filed:
Sep. 15, 1999
John Northcutt, Chapel Hill, NC (US);
Peter Holmqvist, Apex, NC (US);
Ericsson Inc., Research Triangle Park, NC (US);
Abstract
Power consumption during low-power sleep mode in a radiotelephone (,) is minimized. At a predetermined wake-up time, temperature of the radiotelephone is determined (,). A variable wake-up duration is set in response to the temperature (,). After the variable wake-up duration, the radiotelephone returns to a normal operational mode (,). In this manner, circuitry remains in the low-power state as long as possible. Further, a low-resolution secondary timer is used to measure the duration of the sleep period. After the duration timed by the secondary timer, a second duration is timed by a high-resolution primary timer. A timing calibration duration is then timed and a sleep mode is exited in synchronization with system timing.