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:
Apr. 01, 2014
Filed:
Jul. 24, 2012
Daihyun Lim, West New York, NY (US);
Marcel A. Kossel, Reichenburg, CH;
Pradeep Thiagarajan, Chapel Hill, NC (US);
Daihyun Lim, West New York, NY (US);
Marcel A. Kossel, Reichenburg, CH;
Pradeep Thiagarajan, Chapel Hill, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A phase rotator based on voltage referencing is disclosed. A voltage signal is generated that is proportional to the phase difference between two input signals. The voltage signal is then used as the upper voltage limit for a digital-to-analog converter (DAC). The DAC is programmable via an input vector to generate a DAC output. The DAC output is used to generate a phase rotated (phase shifted) output, which is at an intermediate phase between the two input signals.