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:
Jun. 28, 2005
Filed:
Mar. 04, 2003
Steven J. Geissler, Ft. Collins, CO (US);
James R. Kahn, Ft. Collins, CO (US);
Harold R. Kaufman, Laporte, CO (US);
Denis M. Shaw, Ft. Collins, CO (US);
Steven J. Geissler, Ft. Collins, CO (US);
James R. Kahn, Ft. Collins, CO (US);
Harold R. Kaufman, Laporte, CO (US);
Denis M. Shaw, Ft. Collins, CO (US);
Kaufman & Robinson, Inc., Ft. Collins, CO (US);
Advanced Energy Industries, Inc., Ft. Collins, CO (US);
Abstract
In accordance with one embodiment of the present invention, there is provided a switch-mode power supply to generate the heating current for a hot-filament electron-emitting cathode. The power supply directly couples, without an output transformer, the output from a full-bridge converter that operates at an output frequency in the range from ten Hz to ten kHz. A connection to a reference potential that minimizes the potential fluctuation of the cathode is provided by one of the direct-current inputs to the converter.