Accession Number : ADD011621
Title : Acceleration Insensitive Oscillator.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Walls,F L ; Vig,J R
Report Date : 25 Mar 1985
Pagination or Media Count : 17
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.
Descriptors : *PATENT APPLICATIONS, *ACCELERATION, *CRYSTAL OSCILLATORS, OSCILLATORS, SENSITIVITY, CANCELLATION, INVENTIONS, RESONATORS, ELECTRICAL PROPERTIES, REACTANCE, FREQUENCY, OUTPUT, QUARTZ, CAPACITORS, TUNING, VARIABLE CAPACITORS
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE