DONALD ANDRES
Engineering in Foxborough, MA
License number
Massachusetts 36132
Issued Date
Aug 29, 1991
Expiration Date
Jun 30, 2018
Type
Mechanical Engineer
Address
Address
Foxborough, MA 02035
Professional information
Saw Device And Method Of Manufacture
US Patent:
5416447, May 16, 1995
Filed:
Nov 8, 1993
Appl. No.:
8/148816
Inventors:
Donald Andres - Foxboro MA
Thomas E. Parker - Framingham MA
Thomas E. Parker - Framingham MA
Assignee:
Raytheon Company - Lexington MA
International Classification:
H01L 4104, H03B 532
US Classification:
331107A
Abstract:
A SAW oscillator circuit including a housing having disposed therein a surface wave propagation supporting substrate with a pair of transducers coupled by surface waves propagating through the substrate and electronic circuitry connected to the pair of transducers and arranged to provide, with the connected resonator, the SAW oscillator circuit. A weight is attached to the resonator. The housing is susceptible of vibratory deflections which induce vibratory deflections in the substrate and the weight suppresses the vibratory deflections induced in the substrate of the resonator. With such arrangement, while sufficiently thick externally mounted stiffeners are not used because of space limitations, the effects of vibratory deflections induced in the substrate of the insufficiently thick, or un-stiffened housing are compensated by the weight attached to the resonator.