Oscillators – Electromechanical resonator – Vibrating reed or string type
Reexamination Certificate
2006-06-14
2008-11-04
Pascal, Robert J. (Department: 2817)
Oscillators
Electromechanical resonator
Vibrating reed or string type
C331S1160FE
Reexamination Certificate
active
07446619
ABSTRACT:
There are many inventions described and illustrated herein. In one aspect, the present inventions relate to a temperature measurement system comprising (1) a first microelectromechanical resonator to generate a first output signal having a frequency that varies with operating temperature, wherein the first microelectromechanical resonator includes a frequency function of temperature; (2) a second microelectromechanical resonator to generate a second output signal having a frequency that varies with operating temperature, wherein the second microelectromechanical resonator includes a frequency function of temperature; and (3) frequency division circuitry, coupled to the first and second microelectromechanical resonators, to determine data which is representative of the operating temperature of the first and/or second microelectromechanical resonator using (i) data which is representative of the frequency of the first output signal and (ii) data which is representative of the frequency of the second output signal. The frequency division circuitry may include circuitry to divide the frequency of the first output signal by the frequency of the second output signal (whether in digital or analog domain).
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Boser Bernhard E.
Lu Crist Y.
Lutz Markus
Partridge Aaron
Goodley James E
Pascal Robert J.
Patterson & Sheridan LLP
SiTime Corporation
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