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公开(公告)号：US20200174137A1
公开(公告)日：2020-06-04
申请号：US16786360
申请日：2020-02-10
Applicant: QUALCOMM Incorporated
Inventor： Jie WU , Dominic Gerard FARMER , Lalitaprasad DAITA , Emilija SIMIC
Abstract: Disclosed are devices, systems and techniques for propagating a system time maintained at a mobile device in a lower power mode using a sleep counter advanced by an XO crystal oscillator. In one particular implementation, a mobile device obtains initial and subsequent satellite positioning system fixes while in a higher power mode. Between the initial and subsequent position fixes, the mobile device may transition to a lower power mode during which measurements of a temperature of the XO crystal oscillator may be obtained.
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