Synchronization of Two Coupled Crystal Oscillators

Abstract

Synchronization is the phenomenon of two or more autonomous oscillators oscillating with the same frequency due to mutual interactions or common external forces. In this study, we focused on crystal oscillators, which are utilized in a wide variety of electrical circuits. When independently oscillating crystals in each circuit are synchronized in-phase, it is conceivable that simultaneous information processing is possible. To observe synchronization, we designed a circuit containing two Pierce oscillators with a branching path for mutual interactions. Then, we show that in-phase oscillation of the Pierce circuits can be induced by controlling the coupling strength.