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:
Feb. 18, 2003
Filed:
Dec. 11, 2000
Sergiu Silvian, La Crescenta, CA (US);
Wayne A. Morgan, Northridge, CA (US);
Pacesetter, Inc., Sylmar, CA (US);
Abstract
A protection device for use in an implantable medical device such as an ICD that communicates with an external programmer. The protection device includes one or more control blocks that inhibit gate triggers for the switching elements (IGBTs) of an H-bridge whenever the drive voltage for these switching elements falls below a pre-determined level. Each control block provides a controlled path to charge the IGBT gate when triggering is required and, importantly, when the gate drive voltage is above a predetermined threshold. The control block further prevents inadvertent or spurious triggering and protects the gate circuitry of the switching elements by providing a low impedance path between the gates and sources of the IGBTs when the latter switching elements are intended to be turned OFF. Additionally, the control blocks protect the IGBTs from over-voltage effects by clamping the output of the gate trigger with a shunt regulator circuit.