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:
Feb. 14, 2012
Filed:
Jan. 28, 2009
William D. Warner, Maple Ridge, CA (US);
William D. Warner, Maple Ridge, CA (US);
PMC-Sierra, Inc., Santa Clara, CA (US);
Abstract
Apparatus and methods detect the presence of an isolated pulse in a communications signal, such as a data signal carrying data for a serializer/deserializer (SerDes). An example of an isolated pulse is a '1' pulse preceded and followed by '0' pulses, or a “0” pulse preceded and followed by a “1” pulse. These isolated pulses can exhibit a narrow pulse width, and under severe jitter conditions, may not align with a baud sample point, which can cause the isolated pulse to be missed, resulting in a data decoding error. By detecting the presence of these isolated pulses and determining the most likely baud period to which they belong, jitter tolerance can be improved for many channel conditions. This can improve jitter tolerance of a SerDes receiver for links that suffer from various sources of Deterministic Jitter (DJ) such as Duty Cycle Distortion (DCD) and Inter-Symbol Interference (ISI).