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. 20, 2010
Filed:
Dec. 08, 2008
Applicant:
Domenic F. Terranova, North Andover, MA (US);
Inventor:
Domenic F. Terranova, North Andover, MA (US);
Assignee:
Kenet, Inc., Woburn, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A differential reference ladder with an auto zero circuit that can be used as part of a flash analog to digital converter. The auto zero operation is performed relative to a common mode voltage of the ladder. The resistive ladder is disconnected from the rest of the circuit during auto zero mode. As a result, the auto zero adjustment is more accurate, since the offsets are stored under the same common mode connection as when the circuit is in a compare mode. This permits auto zeroing to proceed quickly unencumbered by the parasitic capacitance of the ladder or other components.