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:
Aug. 14, 2012
Filed:
Nov. 29, 2010
Mitsuaki Koyama, Sayama, JP;
Shigetaka Kaga, Sayama, JP;
Kazuo Akaike, Sayama, JP;
Shigenori Watanabe, Sayama, JP;
Mitsuaki Koyama, Sayama, JP;
Shigetaka Kaga, Sayama, JP;
Kazuo Akaike, Sayama, JP;
Shigenori Watanabe, Sayama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
There is provided a temperature compensated piezoelectric oscillator which excels in frequency stability and has a good electronic noise characteristic, and with which a circuit can be structured simply. An auxiliary oscillator unitsharing a crystal substratewith a main oscillator unitoutputting a set frequency fto an outside is used as a temperature detecting unitdetecting a temperature T for obtaining a compensation voltage ΔV in a temperature compensated piezoelectric oscillator (TCXO), and electrodesof the main oscillator unitand the auxiliary oscillator unitare provided separately on the crystal substrate. For example, a fundamental wave and an overtone are used or a thickness shear vibration and a contour shear vibration are used in the main oscillator unitand the auxiliary oscillator unit, respectively.