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:
Sep. 06, 2005
Filed:
Dec. 13, 2001
Robert Kuo-wei Chen, North Andover, MA (US);
John C. Gammel, Birdsborrow, PA (US);
Dewayne Alan Spires, Plaistow, NH (US);
Robert Kuo-Wei Chen, North Andover, MA (US);
John C. Gammel, Birdsborrow, PA (US);
Dewayne Alan Spires, Plaistow, NH (US);
Legerity, Inc., Austin, TX (US);
Abstract
A capacitor cancellation method and apparatus for use in an interface circuit having a transformer blocking capacitor. The method includes sensing a voltage across the transformer blocking capacitor and generating a cancellation signal to compensate for the effect of the transformer blocking capacitor. The apparatus includes a sensor to sense a differential voltage across the transformer blocking capacitor to develop a capacitor signal and an amplifier to amplify the capacitor signal to obtain a cancellation signal.