Title:
POST-COMPENSATION FOR CRYSTAL OSCILLATOR THERMAL DRIFT
Document Type and Number:
WIPO Patent Application WO/2020/215619
Kind Code:
A1
Abstract:
Techniques are described for post-compensation of frequency drift due to changes in crystal oscillator temperature during operation. For example, a clock system is coupled with a crystal oscillator, and can use a reference clock signal from the crystal oscillator to generate an output clock signal using a clock generator. The clock system can monitor an electrical characteristic of a thermal component integrated with the oscillator, which it can map deterministically to a thermal value indicating a temperature of a crystal component of the oscillator. The clock system can then map the temperature deterministically to a frequency shift of the oscillator away from a nominal value. The clock system can then generate a post-compensation signal that directs the clock generator to shift the frequency of the clock output signal so as to compensate for at least a portion of the frequency drift.
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Inventors:
ABOUDINA MOHAMED (US)
EMIRA AHMED (US)
ABUELLIL AMR (US)
EMIRA AHMED (US)
ABUELLIL AMR (US)
Application Number:
PCT/CN2019/111024
Publication Date:
October 29, 2020
Filing Date:
October 14, 2019
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H03L1/02
Foreign References:
| CN105811964A | 2016-07-27 | |||
| CN107733369A | 2018-02-23 | |||
| US20120209558A1 | 2012-08-16 | |||
| US20160182057A1 | 2016-06-23 |
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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