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:
Oct. 14, 2014
Filed:
May. 31, 2011
Michael Penberth, Soham, GB;
Michael Penberth, Soham, GB;
Abstract
A driver circuit () for driving a capacitive load () with a drive pulse having a rise time, a predetermined voltage period and a fall time. The driver circuit () includes an inductance (), switches (), and a transformer () having a primary side () and secondary side (). The switches () are controlled by a controller () to charge the inductance () from a power supply (), and, when the capacitive load () is to be driven, to enable a charge path from the inductance () to the capacitive load () during the rise time, to disable the charge path during the constant peak voltage period and to enable a discharge path via the primary side () of the transformer () during the fall time. As the capacitive load () discharges through the primary side () of the transformer (), charge is induced on the secondary side () of the transformer () and is used to charge the inductance (), thereby saving power and enabling a lower voltage power supply to be used.