MODULATION SCHEME FOR DRIVING A PIEZO ELEMENT

Title:

MODULATION SCHEME FOR DRIVING A PIEZO ELEMENT

Document Type and Number:

WIPO Patent Application WO/2013/070658

Kind Code:

A3

Abstract:

The present disclosure is directed to a modulation scheme for driving a piezo element. In one embodiment, a device may comprise, for example, a piezo element, voltage rails and bridge circuitry. The bridge circuitry may be coupled between the piezo element and the voltage rails. The bridge circuitry may include at least signal sources configured to generate drive signals that cause the piezo element to generate mechanical movement while being coupled to at least one of the voltage rails. In the same or a different embodiment the bridge circuitry may further include comparators, the output of the comparators being usable to determine the resonant frequency of the piezo element. The operating frequency of the bridge circuitry may be configured based on the resonant frequency of the piezo element.

Inventors:

BALOGH LASZLO (US)
SLATER DANIEL ROBERT (GB)

Application Number:

PCT/US2012/063794

Publication Date:

June 18, 2015

Filing Date:

November 07, 2012

Export Citation:

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Assignee:

FAIRCHILD SEMICONDUCTOR (US)
BALOGH LASZLO (US)
SLATER DANIEL ROBERT (GB)

International Classes:

H02N2/06

Foreign References:

US20030098861A1	2003-05-29
US20060113865A1	2006-06-01
US6016052A	2000-01-18
US20060238068A1	2006-10-26

Attorney, Agent or Firm:

FRANK, Elliot, L. et al. (Tucker Perreault & Pfleger, PLLC,55 So. Commercial St, Manchester NH, US)

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