Quartz substrate orientations for compact monolithic differential temperature sensor, and sensors using same
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United States of America Patent
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Jun 6, 2017
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Nov 9, 2012
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Nov 17, 2011
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Abstract
Quartz cuts are provided which exhibit temperature characteristics which are favorable for making differential SAW temperature sensors. Families of Y cuts rotated between 0° and 60° degrees in combination with placement of two resonators at specified angles to each other are disclosed. Further, preferred embodiments in which the resonators are placed on opposite sides of a zero TCF line are disclosed, to provide wide temperature differences while efficiently utilizing the available bandwidth. The design permits placement of the resonator at angles smaller than 12.5° and even less than 5° therebetween, most preferably on quartz rotated Y cut between 28.5° and 42.75°.
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