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. 22, 2012
Filed:
Jun. 30, 2010
Jieming Qi, Austin, TX (US);
David W. Boerstler, Round Rock, TX (US);
Minhan Chen, Cary, NC (US);
Hayden C. Cranford, Jr., Cary, NC (US);
Jieming Qi, Austin, TX (US);
David W. Boerstler, Round Rock, TX (US);
Minhan Chen, Cary, NC (US);
Hayden C. Cranford, Jr., Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A variable gain amplifier includes a first common mode (CM) node configured to receive a first differential signal of a pair of differential signals. A first regulator couples to the first CM node, the first regulator being configured to generate a first CM offset. A second CM node is configured to receive a second differential signal of the pair of differential signals. A second regulator couples to the second CM node, the second regulator being configured to generate a second CM offset. In one embodiment, the first CM offset and the second CM offset together comprise a net CM offset, the net CM offset being configured to replace a current source net offset.