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:
Jul. 16, 1985
Filed:
May. 13, 1982
Daniel H Chin, Lincolnwood, IL (US);
Philip J Nowaczyk, Chicago, IL (US);
Gregory J Beaumont, Arlington Heights, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
Circuitry is described for driving the primary winding of a horizontal output transformer without the use of a conventional drive transformer. The horizontal output transistor is coupled to a tap on the output transformer and is switched off and on to excite the transformer. The horizontal output transistor is driven, in turn, by a driver transistor whose collector is also coupled to a tap on the output transformer such that adequate power is derived from the transformer to drive the output transistor into saturation. The driver transistor receives horizontal scan rate pulse from input circuitry which is preferably adapted to provide a path to ground for stored charges in the output transistor so that it may be rapidly turned fully off when a scan pulse terminates.