What is an Oven Controlled Crystal Oscillator?什么是烤箱控制晶体振荡器/恒温槽晶体振荡器/恒温晶振OCXO？

An OCXO is an “Oven Controlled Crystal Oscillator”, which is a kind of crystal oscillator that has higher frequency stability. OCXOs might be more expensive and larger than other types of crystal oscillators, but the precision of their frequency signal is substantially greater. OCXOs work by heating the crystal beyond a temperature which it would normally encounter, thus helping to maintain the temperature of the crystal at a constant level. The result is much better frequency stability, which is needed for controlling radio transmitter frequency, cell towers, and military communications equipment.

OCXO恒温晶振是一种“烤箱控制晶体振荡器”或“恒温槽晶体振荡器”，是一种具有较高频率稳定性的晶体振荡器。OCXO可能比其他类型的晶体振荡器更昂贵，更大，但其频率信号的精度要高得多。OCXO的工作原理是将晶体加热到超过通常遇到的温度，从而有助于将晶体的温度保持在恒定水平，最终实现其更好的频率稳定性，这是控制无线电发射机频率、手机信号塔和军事通信设备所必需的。

OCXOs are physically much larger than a simple crystal oscillator. This is because they:

OCXO恒温晶振在体积上比普通晶体振荡器大很多，其原因是：

• Contain a heater包含加热器

• Contain control circuitry包含控制电路

• House thermal insulation around the crystal oscillator晶体振荡器隔热保护罩

Oven Controlled Crystal (Xtal) Oscillators, OCXOs, are used in applications where a very high degree of frequency stability is required.

OCXO恒温晶振体积大，功耗也大，但其频率稳定度可以达到PPB级别，因此一般情况下，仅适用于对频率稳定性要求极高的应用。