Method for manufacturing quartz crystal oscillator

Details Method for manufacturing quartz crystal oscillator Method for manufacturing quartz crystal oscillator

2005-11-01

2005-11-01

Tugbang, A. Dexter (Department: 3729)

Metal working

Piezoelectric device making

C029S593000, C029S594000, C029S832000, C029S854000, C029S025410, C310S319000

Reexamination Certificate

active

06959472

ABSTRACT:
In a method for manufacturing a quartz crystal oscillator, at least one of a chemical etching method, a physical etching method, and a mechanical method is utilized to form a quartz crystal tuning fork resonator having a quartz crystal tuning fork base, quartz crystal tuning fork tines connected to the quartz crystal tuning fork base, a fundamental mode of vibration, and a second overtone mode of vibration each comprised of a flexural mode of an inverse phase. An amplification circuit is provided having at least an amplifier. A feedback circuit is provided having the quartz crystal tuning fork resonator and capacitors. The amplifier of the amplification circuit and the quartz crystal tuning fork resonator and capacitors of the feedback circuit are electrically connected together.

REFERENCES:
patent: 4099078 (1978-07-01), Shibata et al.
patent: 4172908 (1979-10-01), Shibata et al.
patent: 4293986 (1981-10-01), Kobayashi et al.
patent: 4421621 (1983-12-01), Fujii et al.
patent: 5373267 (1994-12-01), Kaida et al.
patent: 5824900 (1998-10-01), Konno et al.

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