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. 03, 2014
Filed:
Feb. 08, 2012
Weiqi Ding, Fremont, CA (US);
Mingde Pan, Morgan Hill, CA (US);
Sergey Shumarayev, Los Altos Hills, CA (US);
Peng LI, Palo Alto, CA (US);
Weiqi Ding, Fremont, CA (US);
Mingde Pan, Morgan Hill, CA (US);
Sergey Shumarayev, Los Altos Hills, CA (US);
Peng Li, Palo Alto, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
System, methods, and devices for determining an eye diagram of a serial input signal to an integrated circuit without an oscilloscope are provided. For example, one embodiment of an integrated circuit device may be capable of determining an eye diagram associated with a serial input signal either during or after equalization. The device may include an equalizer and eye viewer circuitry configured to select a node of the equalizer for eye monitoring of the input signal, which may be during or after equalization. In one embodiment, the eye viewer circuitry may provide a separate sampler for each respective node, while sharing a control logic and phase interpolator among the samplers. The eye viewer circuitry may determine horizontal and vertical boundaries of the eye diagram associated with the serial input signal, as seen from the selected node of the equalizer.