Apparatus and methods for on-die instrumentation

US8837571B1 · kind B1 · utility

Assignee

• Altera Corporation · US

Inventors

• Yanjing Ke · Union City, US
• Thungoc M. Tran · San Jose, US
• Weiqi Ding · Fremont, US
• Jie Shen · Fremont, US
• Xiong Liu · Singapore, SG
• Sangeeta Raman · San Jose, US
• Peng Li · Beijing, CN

Key dates

• Filing date: Aug 2, 2013
• Grant date: Sep 16, 2014
• Expiry date: Aug 2, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2025/03356
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

One embodiment relates to a receiver with both decision feedback equalization and on-die instrumentation. A clock data recovery loop obtains a recovered clock signal from an input signal, and a first sampler, which is triggered by the recovered clock signal, generates a recovered data signal from the input signal. A phase interpolator receives the recovered clock signal and generates a phase-interpolated clock signal. A second sampler is triggered by the recovered clock signal in a decision feedback equalization mode and by the phase-interpolated clock signal in an on-die instrumentation mode. Other embodiments and features are also disclosed.