Oscillators – With outer casing or housing – With temperature modifier
Reexamination Certificate
2009-03-09
2011-10-11
Gannon, Levi (Department: 2817)
Oscillators
With outer casing or housing
With temperature modifier
C331S070000, C331S10800D, C331S158000, C310S343000, C310S344000, C310S346000, C310S348000
Reexamination Certificate
active
08035454
ABSTRACT:
The crystal oscillator device includes an air-tight case (1) forming a vacuum chamber (23), a piezoelectric resonator element (11), oscillation circuitry, a temperature sensor, and a heating unit implemented in an integrated-circuit (IC) chip (13) with an active surface (13a). The piezoelectric resonator element (11) and the oscillation circuitry are connected together to form an oscillation circuit. Furthermore, the temperature sensor and the heating unit are enclosed in the vacuum chamber (23) with the piezoelectric resonator element (11).The piezoelectric resonator element is attached in a heat conductive manner to the active surface (13a) of the integrated-circuit chip (13) in such a way that the IC chip provides mechanical support for the piezoelectric resonator element.
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Search Report issued in corresponding application No. EP 09154670, completed Aug. 13, 2009 and mailed Aug. 21, 2009.
Gannon Levi
Griffin & Szipl, P.C.
Micro Crystal AG
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