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:
Mar. 25, 2003
Filed:
Jul. 18, 2001
Ryuhei Yoshida, Toyama, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A piezoelectric oscillator is constructed to prevent deterioration of frequency accuracy caused by external-capacitance variations to maintain a high degree of frequency accuracy. Additionally, an undesired short-circuit is prevented from occurring even when the height of the oscillator is reduced. In this oscillator, on an upper surface of a capacitor substrate only first and second external electrodes connected to a piezoelectric resonator are provided. The piezoelectric resonator connects to the external electrodes. A parallel capacitance section for loading capacitance in parallel to the piezoelectric resonator is connected between the first and second external electrodes. Additionally, load capacitance sections for interposing load capacitances are connected between the first external electrode and a third external electrode and between the second and third external electrodes. The parallel capacitance section and the pair of load capacitance sections are contained in the capacitor substrate.