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Acceleration of a quartz crystal resonator causes changes in the resonant frequency. A resonators propensity to change frequency with acceleration is called acceleration sensitivity. The rate of change in velocity, either positive or negative is most significant factor in frequency deviation with acceleration. The orientation of the resonator with respect to the direction of acceleration or deceleration has a direct effect of the frequency deviation.

Quartz crystal acceleration sensitivity (in an oscillator) varies with the type of cut. Commercially available SC-Cuts have acceleration sensitivities in low parts in 10-10 per g. Turning fork resonators typically used in watches have acceleration sensitivities measured in part in 10-7. The balance of the common cuts of resonators, AT, BT, FC, IT and inverted-mesa resonators, regardless of the type of mount, quartz, wafer geometry, and frequency to 500 MHz. Exhibit an acceleration sensitivity of approximately 3 X 10-9 per g. Few resonators exhibit acceleration sensitivities less than 1 X 10-10 per g.

Acceleration Levels and Effects

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