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:
Mar. 10, 2009
Filed:
Mar. 14, 2007
Bruce Querbach, Hillsboro, OR (US);
Randall B. Hamilton, Hillsboro, OR (US);
Luke A. Johnson, Queen Creek, AZ (US);
Minyoung Kim, Mather, CA (US);
Bruce Querbach, Hillsboro, OR (US);
Randall B. Hamilton, Hillsboro, OR (US);
Luke A. Johnson, Queen Creek, AZ (US);
Minyoung Kim, Mather, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A switched-capacitor circuit that may be used for equalization, but configurable for voltage margining. The switched-capacitor circuit cancels the offset voltage inherent in an amplifier and sets the common mode of an input signal at half the rail voltage. Two capacitors level shift an input signal before being applied to the two input ports of an amplifier. When used for voltage margining, the input voltage swing is reduced at the input ports of the amplifier by connecting a digital-to-analog controlled voltage source to the two capacitors.