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, 1994
Filed:
Mar. 19, 1993
George R Gawell, Mt. Prospect, IL (US);
Philip J Nowaczyk, Chicago, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A multiple frequency horizontal scan system includes a scan frequency compensation system which detects horizontal scan frequency changes by frequency detecting the horizontal sync pulses. A frequency responsive switching system couples the appropriate reactive components to the horizontal defection yoke and horizontal output transformer in response to sync pulse frequency. The system further supplies alternative voltages for the scan system operating supply in response to horizontal sync pulse frequency. In addition, the system provides a convenient source of frequency dependent switching signal which may be utilized to operate additional auxiliary elements in response to changes of horizontal scan system frequency.