Digital adaptation circuitry and methods for programmable logic devices

US8208523B2 · kind B2 · utility

Assignee

• Altera Corporation · US

Inventors

• Wilson Wong · San Francisco, US
• Doris Po Ching Chan · Santa Clara, US
• Sergey Shumarayev · Los Altos Hills, US
• Simardeep Maangat · Sunnyvale, US
• Tim Tri Hoang · San Jose, US
• Tin H. Lai · San Jose, US
• Thungoc M. Tran · San Jose, US

Key dates

• Filing date: Apr 4, 2011
• Grant date: Jun 26, 2012
• Expiry date: Apr 4, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/03885
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Equalization of an incoming data signal can be controlled by sampling that signal at times when data values in that signal should be stable (“data samples”) and when that signal should be in transition between successive data values that are different (“transition samples”). A transition sample that has been taken between two successive differently valued data samples is compared to a reference value (which can be one of those two data samples). The result of this comparison can be used as part of a determination as to whether to increase or decrease equalization of the incoming data signal.