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:
Jun. 21, 2011
Filed:
Jul. 08, 2008
Keith Conroy, Perkasie, PA (US);
Omer Acikel, San Diego, CA (US);
Francesco Caggioni, Winchester, MA (US);
Keith Conroy, Perkasie, PA (US);
Omer Acikel, San Diego, CA (US);
Francesco Caggioni, Winchester, MA (US);
Applied Micro Circuits Corporation, San Diego, CA (US);
Abstract
A system and method are provided for calibrating skew in a multichannel optical transport network (OTN) transmission device. The method accepts a pair of 2-phase shift keying (2PSK) modulated signals via Ix and Qx electrical signal paths, where n>1. Likewise, a pair of 2-PSK modulated signals are accepted via Iy and Qy electrical signal paths where p>1. The Ix, Qx, Iy, and Qy signals are correlated to a preamble/header portion of an OTN frame. A voltage on the Ix signal path is compared with Qx, and VOvoltage is generated. A voltage on the Iy signal path is compared with Qy, and VOis generated. One of the Ix or Qx voltages is compared with one of Iy or Qy voltages to generate VOxy. Then, the VO voltages are minimized in response to adjusting time delay modules in the Ix, Qx, Iy, and Qy signals paths.