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. 31, 1988
Filed:
Jan. 06, 1987
Kirk Oliver, Forest Park, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A top/bottom pincushion correction transformer injects a horizontal rate correction signal in series with a vertical yoke that is driven from a vertical amplifier that has a non-inverting and an inverting terminal. A feedback arrangement includes a voltage sensing resistor for supplying a voltage indicative of the current flow in the yoke to the non-inverting terminal of the amplifier. The primary winding of a pincushion transformer is connected in series with a current limiting resistor and their junction is connected by a bridging resistor to the voltage sensing resistor. The voltage developed across the voltage developing resistor is of opposite polarity to the voltage developed across the current limiting resistor for offsetting the same.