Oscillating device, oscillating element and electronic apparatus

摘要

An oscillating device includes a temperature compensated oscillator that compensates a frequency temperature characteristic in a temperature compensation range including apart of a first temperature range, and a temperature control circuit that includes a heater and controls a temperature of a quartz crystal resonator of the temperature compensated oscillator into a second temperature range included in the temperature compensation range. Further, the temperature compensation range of the temperature compensated oscillator may include a part of the first temperature range in which compensation can be performed by first-order approximation.

主权项

1. An oscillating device comprising:
a temperature compensated oscillator that includes an oscillating element, the oscillating element having a frequency temperature characteristic obtained based on a first temperature range by linear function approximation, the first temperature range having a first upper-limit temperature and a first lower-limit temperature; and a temperature control circuit that controls the temperature of the oscillating element within a second temperature range, the second temperature range having a second upper-limit temperature and a second lower-limit temperature, wherein the temperature compensated oscillator is used within an operating temperature having an operating upper-limit temperature and an operating lower-limit temperature, the operating upper-limit temperature is within the first temperature range, and the temperature compensated oscillator compensates the frequency temperature characteristic of the oscillating element placed within the first temperature range by the linear function approximation, and the second temperature range is within the first temperature range and includes the operating upper-limit temperature.