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石英晶体频标
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石英晶体频标
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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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ancient Chinese sluices
Ancient Chinese Sports Cultural Relics Exhibition
ancient Chinese steels of cast iron decarburized in liquid state
ancient Chinese supervisory system
ancient Chinese taxation law
ancient Chinese thought of division of labor
ancient Chinese title conferring system
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Ancient Cities in Ussuriysk
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ancient city of Lamu
Ancient City of Pingyao World Culture Heritage
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Ancient City Site at Luxian
Ancient City Wall at Yuzhou
Ancient City Wall at Zhaoqing
ancient clerical script
ancient color
ancient constitution
ancient construction technology
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