Patent · US Expired

Driving circuit for piezoelectric actuators, in particular for a read/write transducer for hard disks

US6778349B2 · kind B2 · utility

9Cited by

3References

24Claims

0Family size

Assignee

STMicroelectronics SA

Inventors

Giulio Ricotti · Pavia, IT
Sandro Rossi · Pavia, IT
Giovanni Frattini · Pavia, IT

Key dates

Filing date	Jul 6, 2001
Grant date	Aug 17, 2004
Priority date	—
Expiry date	Apr 17, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/0075
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A driving circuit for piezoelectric actuators comprises a chip of semiconductor material integrating both an interface circuit receiving at input a control signal generated by a control logic unit, and a power circuit driving the piezoelectric actuators. The power circuit is directly connected to the output of the interface circuit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.