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quartz crystal frequency standard
释义
quartz crystal frequency standard
Encyclopedia
工学
频率标准
释
quartz crystal frequency standard
石英晶体频标
利用石英晶体的压电特性、高Q特性及稳定的物理化学性能,与振荡电路一起组成高稳定的石英晶体振荡器,从而输出较高准确度和稳定度的特定频率信号的频率标准。又称石英晶振频标(简称晶振频标)、石英晶体振荡器(简称晶振)。通常指日老化率在10-10量级或优于此量级,在计量或其他系统作为标准使用的晶振。
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angle of arrival positioning
angle of attack
angle of circumference
angle of commutation
angle of contingence
angle of declination
angle of deflection
angle of departure
angle of depression
angle of deviation
angle of diffraction
angle of diffraction, diffraction angle
angle of dip
angle of divergence
angle of eccentricity
angle of elevation
angle of emergence
angle of emission
angle of field of view
angle of final open pit slope
angle of friction
angle of gradient of the hole
angle of image field of view
angle of impact
angle of impedance
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