Acceleration Insensitive Oscillator.
Abstract
This invention related generally to improvements in the acceleration sensitivity of quartz crystal oscillators and more particularly to the elimination of acceleration-induced frequency shifts in such oscillators. A crystal oscillator, including two crystals of unequal acceleration sensitivity magnitude and mounted such that their respective acceleration sensitivity vectors are aligned in an anti-parallel relationship, further includes at least one electrical reactance, such as a variable capacitor, coupled to one of the crystals for providing cancellation of acceleration sensitivities. After the acceleration sensitivity vectors of the two crystals are aligned anti-parallel. The variable capacitor is adjusted until the net or resultant acceleration sensitivity vector of the pair of resonators is reduced to zero. A second electrical reactance, such as a variable capacitor, is utilized as a tuning capacitor for adjusting the oscillator's output frequency to the desired level, while maintaining the cancellation of acceleration sensitivities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 25, 1985
- Accession Number
- ADD011621
Entities
People
- F. L. Walls
- J. R. Vig
Organizations
- United States Army