A Shock Hardened Precision Timer

Precision time bases capable to withstanding high shock application have been difficult to achieve due to the inherent sensitivity of stable, frequency control component to vibration and inertial loading. These limitations are due substantially to packaging requirements of the components, e.g. hermetic, non-surface-contracting enclosures. The assembled component and its package could not be rigidly mounted to meet shock requirements. This project addresses these limitations through the use of a precision resonator device mounted and potted directly on the oscillator circuit board. The resonator structure will be based on the STW (Surface Transverse Wave) resonator. Various resonator designs will be evaluated for compatibility with encapsulation. Prototype oscillators will be assembled and tested using resonators potted in situ.