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:
Oct. 28, 2003
Filed:
Aug. 01, 2002
Kuichi Kubo, Saitama, JP;
Fumio Asamura, Saitama, JP;
Nihon Dempa Kogyo Co. Ltd., Tokyo, JP;
Abstract
A quartz-crystal oscillator comprises an oscillating stage and a buffering stage. The oscillating stage has a resonance circuit including a quartz-crystal unit and a capacitor, and an inverting amplifier amplifying a resonance frequency component of the resonance circuit due to feedback oscillation. The buffering stage is provided for outputting the output of the oscillating stage by reducing the amplitude thereof, and has first and second MOS FETs of the same conductive type arranged in series between a power supply and a reference potential. A signal at the output terminal of the inverting amplifier is impressed to the gate of the first MOS FET, a signal at the input terminal of the inverting amplifier is impressed to the gate of the second MOS FET, and an output signal is obtained from a connecting point of the first and second MOS FETs.