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. 07, 2008
Filed:
Aug. 03, 2006
Ronald Scott Boe, Castaic, CA (US);
Ronald Scott Boe, Castaic, CA (US);
HR Textron, Inc., Santa Clarita, CA (US);
Abstract
A charge pump circuit employs an oscillator powered by a variable positive supply voltage, storage and switching circuitry controlled by an oscillator signal from the oscillator, and a regulator that maintains a negative supply voltage generated by the storage and switching circuitry at a target value through control of the variable positive supply voltage. The charge pump can be used in a power stage employing normally on switching transistors (such as silicon carbide junction FETs or SiC JFETs) that require a negative voltage to be turned completely off. Such power stages are in turn useful in applications including military aerospace applications having harsh electromagnetic interference (EMI) conditions, where they may be controlled by optical control signals conveyed by optical fibers from a more benign operating environment within the body of an aircraft.