公开(公告)号：US20060192626A1

公开(公告)日：2006-08-31

申请号：US11362649

申请日：2006-02-25

申请人： Bryan Milliren ,  Roger Clark

发明人： Bryan Milliren ,  Roger Clark

IPC分类号： H03B5/32

CPC分类号： H03B5/04 ,  H03B5/366 ,  H03L1/04

摘要： A double oven crystal oscillator (DOCXO) is disclosed which is highly stable by incorporating means to reduce the effects of ambient pressure changes on the frequency of the oscillator. The oscillator crystal is mounted in a temperature controlled inner oven to reduce the effects on the frequency stability of the oscillator. The oscillator circuitry and all circuitry associated with the inner oven is mounted in good thermal contact with the inner oven. A Faraday shield at ground potential is placed over the oscillator circuitry to minimize the effects of stray capacitance between the oscillator components and the case wall of the inner oven. The effects of minor deformations in the case walls within the oscillator caused by ambient pressure changes and other factors causing pressure changes are thereby greatly minimized. To further reduce effects on oscillator frequency stability the ovens of the DOCXO are temperature controlled, cases are hermetically sealed, the case walls are rigid, and ovens and cases may be evacuated.

摘要翻译： 公开了一种双炉晶体振荡器（DOCXO），其通过并入降低环境压力变化对振荡器频率的影响的方法而具有高度的稳定性。 振荡器晶体安装在温度控制的内部烘箱中，以减少对振荡器的频率稳定性的影响。 振荡器电路和与内部烘箱相关的所有电路与内部烘箱良好的热接触。 接地电位的法拉第屏蔽放置在振荡器电路上，以最小化振荡器部件与内部烘箱的壳体壁之间的杂散电容的影响。 由环境压力变化引起的振荡器外壳壁内的微小变形和导致压力变化的其他因素的影响因此大大降低。 为了进一步减少对振荡器频率稳定性的影响，DOCXO的炉子是温度控制的，壳体被气密密封，壳体壁是刚性的，并且炉子和壳体可能被排空。