Accession Number : ADD010148

Title :   Stress Compensated Quartz Resonator Having Ultra-Linear Frequency-Temperature Response.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Nakazawa,Mitsuo ; Ballato,Arthur ; Lukaszek,Theodore J

Report Date : 29 Mar 1983

Pagination or Media Count : 16

Abstract : A new family of stress compensated quartz resonators having cuts exhibiting an ultra-linear frequency vs. temperature characteristic. This family of resonators has an orientation defined with respect to the crystallographic axes by polar angles phi and theta, which angles lies on the locus where the second-order temperature coefficient of frequency is zero between the angles phi = 20 deg + or - 2 deg and theta = 20 deg + or - 5 deg, and in close proximity to the locus of zero coefficient of stress. In one preferred embodiment, the resonator comprises a plate whose angles of cut phi and theta are both substantially equal to 20 deg. In a second preferred embodiment an exact stress compensation is provided where phi is substantially equal to 20.8 deg and theta is substantially equal to 23.2 deg, an orientation where the locus of the zero coefficient of stress intersects the locus of the zero of the second-order temperature coefficient. (Author)

Descriptors :   *Patent applications, *Quartz resonators, *Stresses, *Frequency, *Compensation, Linear systems, Comparison, Temperature coefficients, Plates, Angles, Inventions

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE