Surface-mount crystal oscillator
AssigneeNihon Dempa Kogyo Co., Ltd.
InventorToshikatsu Makuta
Life of this patent
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Abstract
A surface-mount quartz crystal oscillator has a casing substantially in the shape of a substantially rectangular parallelepiped, the casing having a recess defined therein, a pair of upper steps disposed in the recess, a lower step disposed in the recess and having electrically conductive pads thereon, a crystal blank having an end secured to one of the upper steps and an opposite end placed on the other of the upper steps, and an IC chip disposed on the bottom of the recess and electrically connected to the electrically conductive pads by wires according to wire bonding, the IC chip including a circuit, the circuit and the crystal blank jointly making up an oscillating circuit. The wires extend in a direction substantially perpendicular to a longitudinal direction of the casing.
Claims6
A surface-mount crystal oscillator comprising:
- a casing substantially in a shape of a substantially rectangular parallelepiped, said casing having a recess defined therein;
- a pair of upper steps disposed in said recess;
- a lower step disposed in said recess and having electrically conductive pads thereon;
- a crystal blank having an end secured to one of said upper steps and an opposite end placed on the other of said upper steps;
- and
- an IC chip disposed on the bottom of said recess and electrically connected to said electrically conductive pads by wires according to wire bonding, said IC chip including a circuit, said circuit and said crystal blank jointly making up an oscillating circuit;
- wherein said wires extend in a direction substantially perpendicular to a longitudinal direction of said casing.
Dependencies are inferred from the claim text.