Patent · US Active

Timing error adjustment in mobile devices

US11762102B2 · kind B2 · utility

0Cited by

4References

24Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Philip Crary · Mission Viejo, US
Troy Li · Irvine, US
Scott Scigliano · Orange, US

Key dates

Filing date	Feb 27, 2020
Grant date	Sep 19, 2023
Priority date	—
Expiry date	Mar 28, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04W56/0035
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

System and method for adjusting timing error in a mobile device. In the mobile device, a crystal oscillator (XO) is used by a system timer as the timing source. When the mobile device enters into a sleep mode, the system timer is set to time the duration of the sleep mode. During the sleep mode, a thermistor is used to measure and monitor the temperature changes of the XO. After the sleep mode is over, a processor in the mobile device determines the frequency changes of the XO based on the temperature changes of the XO. Based on the frequency changes of the XO, the processor determines the timing error that may have occurred when the system timer was timing the sleep mode and determines the actual duration of the sleep mode by adjusting the duration timed by the system timer based on the timing error.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.