Oscillator with frequency stabilizing circuit and

专利名称：Oscillator with frequency stabilizing circuit

and method of constructing same

发明人：John F. Flood申请号：US09683747申请日：20020211公开号：US06501340B1公开日：20021231

专利附图：

摘要：An apparatus and method for stabilizing the frequency of a piezoelectric crystalresonator, especially useful in common emergency positioning radio beacons. A

temperature compensated crystal oscillator circuit (TCXO) is mounted on one surface of

a thin substrate. The TCXO includes a piezoelectric device such as a quartz resonator anda capacitor thermistor compensation network to reduce the frequency fluctuations ofthe crystal through variations in temperature. A heating circuit is mounted to theopposing surface of the substrate, thereby providing a thermal connection between thetwo circuits. The heating circuit includes a temperature sensor for sensing changes inambient temperatures and a heater control amplifier for adjusting the power of a heatingelement. The substrate with the two circuits disposed thereon is suspended within ahermetically sealed enclosure by a plurality of support pins. The pins assist in supportingthe substrate away from the interior walls of the enclosure thereby reducing heat loss.The crystal oscillator is therefore maintained within a certain temperature range whiletemperatures at which activity dips often occur are avoided. The invention is also amethod for constructing an electronic component heater assembly, including theconstruction of conventional oven controlled crystal oscillators.

申请人：ACR ELECTRONICS, INC.

代理机构：Malin, Haley & DiMaggio, P.A.

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