音叉晶体抛物线温度曲线
由于其独特的形状,音叉晶体无法在宽温度范围内提供高精度。它们的温度精度可以绘制为随温度变化的抛物线曲线。该精度在室温或大约 +25°C 下通常为 ±20ppm。这相当于每天增加或减少 1.7 秒的时间或每年减少 10.34 分钟。图 1 显示了在极端高温和极端低温下精度的下降。伊西斯的音叉晶体ECS-.327-12.5-16-TR为COTS,汽车提供理想解决方案
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