Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1994-06-29
1995-12-05
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310344, 310348, 310361, H01L 4108
Patent
active
054732166
ABSTRACT:
A method and device for selectively reducing the frequency-temperature-shift of piezoelectric crystals. The piezoelectric device (100) includes a substrate (102), a piezoelectric element (106) and a temperature dependent interface structure (120) for beneficially stressing the piezoelectric element at a predetermined temperature range. The substrate (102), piezoelectric element (106) and temperature-dependent interface structure (120) define a piezoelectric package having a predetermined non-compensated third order Bechmann curve having a low temperature end and a high temperature end, with an inflection point therebetween, whereby the frequency-temperature shift is reducable on the third order Bechmann curve.
REFERENCES:
patent: 3719838 (1973-03-01), Peduto et al.
patent: 3898489 (1975-08-01), Grady et al.
patent: 4362961 (1982-12-01), Gerber
patent: 5291460 (1994-03-01), Harada et al.
patent: 5405476 (1995-04-01), Knecht
"Reduction of the frequency-temperature shift of Piezoelectric Resonators By Mechanical Stress" by Gerber et al. Nov., 1961, Proceedings of the IRE.
Brosig Jill A.
Laurich Matt
Cunningham Gary J.
Dougherty Thomas M.
Motorola Inc.
LandOfFree
Piezoelectric device for controlling the frequency-temperature s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piezoelectric device for controlling the frequency-temperature s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric device for controlling the frequency-temperature s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1375964