The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2003
Filed:
Aug. 30, 2000
Applicant:
Inventors:
Takeshi Shimizu, Fukushima, JP;
Masataka Kumaki, Aomori-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/04 ;
U.S. Cl.
CPC ...
H03B 5/04 ;
Abstract
A crystal-oscillator circuit includes an oscillation transistor having the collector or the base thereof at a ground potential. A first capacitor is connected between the base and the emitter of the oscillation transistor. A second capacitor is connected between the emitter and the collector. A quartz crystal resonator and a third capacitor are connected in series between the base and the collector. The third capacitor is disposed at the ground potential side. An oscillation signal is extracted from a node between the quartz crystal resonator and the capacitor.