Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1993-08-23
1994-08-02
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310361, 310333, H01L 4108
Patent
active
053349008
ABSTRACT:
A torsional quartz crystal resonator has a specific cut type resulting in improved frequency temperature behavior. The cut type is defined by rotating a Z plate quartz crystal around an x-axis at an angle .phi. in the range of 0.degree. through 30.degree. and by further rotating the plate around a z'-axis at another angle .theta. in the range of -20.degree. through -10.degree. or +10.degree. through +20.degree.. The resonator has a thickness z.sub.0 and a width x.sub.0 determined such that a thickness-to-width ratio Rzx=z.sub.0 /x.sub.0 is set within the range of 0.6 through 1.1 to make the first order temperature coefficient substantially zero in combination with the optimum angles .phi. and .theta.. Excitation electrodes are disposed on major faces of the resonator normal to the z' axis, and a connecting electrode is disposed on a side face of the resonator to reduce the series resistance R.sub.1.
REFERENCES:
patent: 3375379 (1968-03-01), Royer
patent: 3969641 (1976-07-01), Oguchi
patent: 4437773 (1984-03-01), Dinger et al.
patent: 4450378 (1984-05-01), Hermann
patent: 4486682 (1984-12-01), Nakazawa
patent: 4499395 (1985-02-01), Kahan
patent: 4503353 (1985-03-01), Hermann
patent: 4540909 (1985-09-01), Takahashi et al.
patent: 4592663 (1986-06-01), Eer Nisse et al.
patent: 4772130 (1988-09-01), Ueda et al.
patent: 5156460 (1992-10-01), Norling et al.
Adams Bruce L.
Budd Mark O.
Seiko Electronic Components Ltd.
Wilks Van C.
LandOfFree
Torsional quartz crystal resonator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Torsional quartz crystal resonator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torsional quartz crystal resonator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-66998