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Microresonator of double-ended tuning fork configuration

  • US 4,469,979 A
  • Filed: 05/27/1983
  • Issued: 09/04/1984
  • Est. Priority Date: 05/27/1983
  • Status: Expired due to Term
First Claim
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1. In a quartz crystal microresonator of the type including first and second stem portions, a pair of integral tines extending between said stem portions, a slot between said tines, said slot having opposed crotches where said tines join said stem portions, and a plurality of electrodes mounted on each of said tines, spaced along the length thereof, said electrodes being adapted for receipt of an AC voltage for causing said tines to oscillate, the improvement wherein the crystal orientation is (ZYw) θ

  • and said electrodes are mounted onn said tines such that the polarity of the electrodes changes along the length of the tines at points derived by determining where the second derivative of the lateral displacement of the tines with respect to length changes polarity.

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