Patent ID: 8536952
Filing Date: 2013-09-17
Classification: H03L

Abstract:
1. An oscillation device using quartz-crystal oscillators, comprising: a first quartz-crystal oscillator structured by providing first electrodes on a quartz-crystal piece; a second quartz-crystal oscillator structured by providing second electrodes on a quart-crystal piece; a first oscillation circuit and a second oscillation circuit connected to said first quartz-crystal oscillator and said second quartz-crystal oscillator, respectively; a frequency difference detecting unit determining, when an oscillation frequency of said first oscillation circuit is set to f a compensation value obtaining unit for aging compensation obtaining a frequency compensation value of f the compensation coefficient of aging is a ratio between an amount of change in the frequency of said first oscillation circuit and an amount of change in the frequency of said second oscillation circuit with respect to an elapse of operating time from the reference time; an output of said oscillation device is structured to be generated by utilizing an output of said first oscillation circuit; and a set value of the output frequency is structured to be compensated based on the frequency compensation value determined by said compensation value obtaining unit.