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:
Apr. 09, 2013
Filed:
Jun. 11, 2009
Mei Luo, San Jose, CA (US);
Thungoc M. Tran, San Jose, CA (US);
Tim Tri Hoang, San Jose, CA (US);
Tin H. Lai, San Jose, CA (US);
Mei Luo, San Jose, CA (US);
Thungoc M. Tran, San Jose, CA (US);
Tim Tri Hoang, San Jose, CA (US);
Tin H. Lai, San Jose, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A circuit includes a receiver circuit, a decision feedback equalizer circuit, and a control loop circuit. The receiver circuit receives a data signal and generates an input signal in response to the data signal. The decision feedback equalizer circuit includes a tap driver and a first current source coupled to the tap driver. The tap driver drives the input signal based on a tap weight. The control loop circuit varies a current through the first current source based on variations in the input signal to reduce changes in the tap weight that are caused by the variations in the input signal.