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Background oscillator calibration

專利號
US11800464B2
公開日期
2023-10-24
申請人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Jie Wu; Daniel Fred Filipovic; Emilija Milorad Simic; Vishal Agarwal
IPC分類
H04W56/00; G01S19/23; H03L1/02
技術領域
xo,gnss,or,in,be,trigger,calibrated,device,may,status
地域: CA CA San Diego

摘要

System and method for temperature-calibration of a crystal oscillator (XO) in a mobile device. A temperature-calibration status of the XO is determined and a trigger condition related to temperature-calibration of the XO is detected. If the temperature-calibration status of the XO is not fully temperature-calibrated or if the XO has not been previously temperature-calibrated, a temperature-calibration session is initiated by an XO manager based on the condition, wherein a receiver is configured to receive signals and temperature-calibration of the XO is performed in a background mode based on the received signals. The condition based triggering ensures that the XO is temperature-calibrated prior to launch of any position based or global navigation satellite systems (GNSS) based applications on the mobile device. The trigger condition can include first use or power-on, charging, presence in an outdoor environment, variation in operating temperature, pre-specified time, and/or user input pertaining to the mobile device.

說明書

In one exemplary configuration, XO manager 108 may initiate operations related to temperature-calibration or a temperature-calibration session of XO 106 based on exemplary triggers or triggering conditions. In one example, initiation of temperature-calibration of XO 106 may be triggered using one or more mechanisms or conditions which will be described in detail in the following sections. In some embodiments, logic for detecting and responding to the trigger conditions according to various triggering mechanisms, for example, based on temperature sensor 114, may be located anywhere on device 100, including within XO manager 108, although such logic is not explicitly illustrated. Skilled persons will understand various techniques for implementing and generating exemplary triggers based on the disclosure herein. Based on a received triggering condition, in one embodiment, XO manager 108 may send a command or logical signal to receiver 102 in order to inform receiver 102 to start searching for and/or receiving wireless signals, such as GNSS signals. In another embodiment, the trigger condition may be used to enable receiver 102 to commence searching/receiving functions.

權利要求

1
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