| 摘要 |
PURPOSE:To increase the watch accuracy by detecting the beat and phase difference of the oscillation frequencies each other of the oscillators using the crystal oscillators featuring the peak temperatures and then applying the output of the oscillator which oscillates at the highest frequency for the watch signal. CONSTITUTION:Outputs f1 and f2 of the crystal oscillators featuring the different the peak temperatures and equal oscillation frequencies at each peak temperature are used for comparison 3 of the height of the frequencies of both oscillators by detecting the beat and phase between both oscillation frequencies. Then the output of the oscillator featuring the highest frequency obtained through the comparison result is selected by switching circuit 4 to be sent to divider/driver circuit 5. |
