REFERENCE FREQUENCY GENERATING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a reference frequency generating apparatus with low power consumption that can generate a synchronizing signal with high accuracy and a reference frequency signal with high stability and reduce a time until the reference frequency is stabilized at starting. SOLUTION: A GPS receiver 2 generates an intermediate frequency signal A and a 1-second pulse signal B synchronously with the coordinated universal time, a frequency converter 4 converts an oscillation signal of a voltage- controlled crystal oscillator 3 covered by a metal-made case 100 into a signal A' with the intermediate frequency, a phase comparator 5 compares the phase of the intermediate frequency signal A with that of the signal A', a crystal voltage controller 6 controls a voltage applied to the voltage-controlled crystal oscillator 3 so as to synchronize the signal A' with the intermediate frequency A on the basis of the result of comparison, a Peltier current controller 9 controls a current supplied to a Peltier element 7 on the basis of the measurement result of an in-case temperature sensor 8 to bring the temperature in the metal-made case 100 to a target setting value.