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:
May. 21, 1991
Filed:
Sep. 30, 1987
Robert J Alvord, Elmwood Park, IL (US);
Raymond Bambule, Naperville, IL (US);
Roy W Orr, Jr, Mundelein, IL (US);
Thomas L Sorensen, Berwyn, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A monostable, that is triggered by either positive or negative polarity horizontal sync pulses, supplies the horizontal deflection system of a monitor. A first transistor of the monostable has its emitter and its base connected through oppositely poled diodes to the horizontal sync input terminal of the monitor. Incoming horizontal sync pulses of either polarity trigger a respective one of the diodes to drive the first transistor into conduction. The time constant of the first transistor is selected to be slightly greater than the duration of the input sync pulses to preclude the monostable triggering on the trailing edge of a sync pulse.