于描述一个晶体频率特性的参数主要有频率容限（Frequency Tolerance）、频率温度特性（Frequency Temperature Characteristics）和频率电压特性(Frequency Voltage Characteristics)，它们描述晶体振荡频率随外界因素影响而发生的变化，用ppm和ppm/V表示。
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Studies the resonator frequency temperature characteristic, then designs the middle-frequency tracking band pass filter.
研究了谐振子频率的温度特性并设计了频率跟踪带通滤波器。
The result shows that by controlling cut angle and environment conditions, frequency-temperature characteristic of quartz resonators can be adjusted to meet engineering needs.
结果表明，对切角及环境因素进行控制，可使石英晶体谐振器的频率–温度特性满足工程的需要。
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