Patent ID: 9225342
Filing Date: 2015-12-29
Classification: H03L

Abstract:
1. An oscillation device that corrects a setting value of an output frequency based on a detection result of an ambient temperature of a crystal unit, the oscillation device comprising: an oscillation circuit used for an output of an oscillator connected to a crystal unit or an oscillator output; a temperature detection portion that detects the ambient temperature and outputs a digital value corresponding to the temperature detection value; an accumulator that accumulates the digital value based on a predetermined accumulation number; a first rounding processing portion that performs rounding for the digital value accumulated in the accumulator based on a predetermined rounding factor; a digital filter that receives a digital value obtained from the first rounding processing portion and obtains a step response gradually increasing from “0” and converging to a step value which is an input value; and a correction value obtaining portion that obtains a frequency correction value of the oscillation frequency of the oscillation circuit caused by a difference between the ambient temperature and a reference temperature based on an output value of the digital filter, wherein the setting value of the output frequency is corrected based on the frequency correction value obtained from the correction value obtaining portion.