博客
Crystal oscillator （晶體振蕩器）
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A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a precise frequency. This frequency is commonly used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers. The most common type of piezoelectric resonator used is the quartz crystal, so oscillator circuits incorporating them became known as crystal oscillators, but other piezoelectric materials including polycrystalline ceramics are used in similar circuits.
晶體諧振器（振蕩器）屬于電子振蕩電路的一種，其借助壓電材料的特性，即由振蕩的晶體的機械共振產生一個精確的電信號頻率。通常用于記錄時間，如在石英手表中，其通常能為數字集成電路提供一個穩定的時鐘信號；也可用于無線電發射機和接收機。石英晶體是最常見，也是常用的壓電諧振器。因此，一些使用了石英晶體的振蕩電路常被稱為晶體諧振器。另外還有一些壓電材料，包括多晶陶瓷也被應用在相似的電路中。
Quartz crystals are manufactured for frequencies from a few tens of kilohertz to hundreds of megahertz. More than two billion crystals are manufactured annually. Most are used for consumer devices such as wristwatches, clocks, radios, computers, and cellphones. Quartz crystals are also found inside test and measurement equipment, such as counters, signal generators, and oscilloscopes.
加工成型的石英晶體的頻率可從幾十千赫茲到數百兆赫茲。每年生產的石英晶體的總量超過二十億個！大多數被用于消費性產品，諸如手表、時鐘、收音機及移動電話。在測試測量設備中也有它們的身影，例如計數器、信號發生器及示波器。
