OSCILLATING DEVICE

WIPO Patent Application WO/2019/188990

A1

[Problem] To provide a technique, with respect to an oscillating device that uses a crystal oscillator and stabilizes an oscillating frequency on the basis of an external clock signal, for stabilizing the oscillating frequency that is output even when the external clock is interrupted. [Solution] An oscillating device which outputs a frequency signal on the basis of an oscillating frequency of a crystal oscillator 10 and a frequency setting value and is provided with: a frequency difference detection unit 207 for determining a difference value corresponding to a frequency difference between an output frequency of the oscillating device and an external clock signal; and a temperature detection unit. During a period in which the external clock signal is being acquired, an aging coefficient (a1) and a temperature characteristic coefficient (a2) are determined on the basis of a change over time of the difference value determined by the frequency difference detection unit 207, and a change over time of a detected temperature. Further, during a hold-over period, a frequency correction value is calculated using the aging coefficient (a1) and the temperature characteristic coefficient (a2), and is added to the frequency setting value.

JP6753068	Timing signal generators and electronic devices
JP2006109512	TUNABLE MULTIPLEXER

KOBATA TSUKASA (JP)

PCT/JP2019/012521

October 03, 2019

March 25, 2019

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NIHON DEMPA KOGYO CO (JP)

H03L1/02; H03L7/14

JP2017123629A	2017-07-13
JP2012195932A	2012-10-11
JP2017153024A	2017-08-31
US5881374A	1999-03-09

YAYOY PATENT OFFICE (JP)

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