Abstract: As the reference frequency source, crystal oscillator plays a critical role in the electronic equipments. Crystal oscillator is sensitive to the acceleration, such as vibration, concussion and centrifugal force, which would influence the stability of the frequency output. How acceleration affects the frequency and phase noise of crystal oscillator is discussed, some current measures of reducing the acceleration effects are introduced. A new method based on the digital compensating system is also brought up.

Key words: Crystal oscillator, Acceleration sensitivity, Digital compensation