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. 22, 2006
Filed:
May. 21, 2003
Harold L. Stalford, Norman, OK (US);
Michael A. Butler, Andover, MA (US);
W. Kent Schubert, Albuquerque, NM (US);
Harold L. Stalford, Norman, OK (US);
Michael A. Butler, Andover, MA (US);
W. Kent Schubert, Albuquerque, NM (US);
Sandia Corporation, Albuquerque, NM (US);
Abstract
A method for tuning a vibratory device including a cantilevered resonator comprising the steps of increasing a voltage Vsupplied to the vibratory device to thereby increase the bandwidth of the vibratory device; and keeping the resonant frequency of the vibratory device at substantially that natural frequency of the cantilevered resonator, wherein the vibratory device comprises: a capacitor including a movable plate and a fixed plate spaced from each other, the movable plate being part of the cantilevered resonator; a voltage source connected to the capacitor for providing voltage Vacross the capacitor to produce an attractive force between movable plate and fixed plate; a circuit connecting the voltage source to the capacitor; and a load resistor in said circuit having a resistance Rsatisfying the following equation:where: μ is at least 10; ωis the beam constant for the cantilevered resonator; cis the capacitance for the capacitor; and λ is the voltage dependent coupling parameter for voltage V.