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. 10, 2012
Filed:
Nov. 04, 2009
Dawei Huang, San Diego, CA (US);
Deqiang Song, Dan Diego, CA (US);
Jianghui Su, San Jose, CA (US);
Drew G. Doblar, San Jose, CA (US);
Dawei Huang, San Diego, CA (US);
Deqiang Song, Dan Diego, CA (US);
Jianghui Su, San Jose, CA (US);
Drew G. Doblar, San Jose, CA (US);
Oracle America, Inc., Redwood City, CA (US);
Abstract
An asymmetric DFE receiver circuit is disclosed. The receiver circuit includes a voltage measuring unit configured to determine a signal voltage of a received signal, and a comparator unit configured to calculate a difference between the signal voltage and an evaluation threshold voltage and to compare the difference to the value of a midpoint voltage. The comparator unit is configured to generate a first control signal if the difference is greater than the midpoint voltage value or a second control signal if the signal voltage is less than the midpoint voltage value. The receiver includes an adjustment circuit configured to adjust the evaluation threshold voltage toward the signal voltage if the first control signal is generated and away from the signal voltage if the second control signal is generated. The rates of adjustment may vary depending upon whether the received signal is a transition bit or a non-transition bit.