Contact heater for piezoelectric effect resonator crystal
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United States of America Patent
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-
May 31, 1988
Issued Date -
N/A
app pub date -
Nov 25, 1985
filing date -
May 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A contact heater arrangement is disclosed for a piezoelectric effect crystal resonator. The piezoelectric effect crystal element may be an SC cut quartz crystal disc having electrodes affixed to one side thereof to generate a lateral field in the crystal disc. The contact heater element is applied to the side of the crystal element opposite the side on which the electrodes are affixed. The particular pattern of the heater leaves the center of the crystal element exposed for frequency adjustment purposes. Locating the heating element and electrodes on opposite sides of the crystal element generates a constant temperature which has been found effective to uniformly heat a piezoelectric effect crystal element, and with appropriate control circuitry, allows for temperature stabilization of the crystal element.
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