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:
Aug. 07, 2012
Filed:
Dec. 09, 2009
Frankie Y. Liu, Palo Alto, CA (US);
Dinesh D. Patil, Fremont, CA (US);
Ronald Ho, Mountain View, CA (US);
Elad Alon, El Cerrito, CA (US);
Frankie Y. Liu, Palo Alto, CA (US);
Dinesh D. Patil, Fremont, CA (US);
Ronald Ho, Mountain View, CA (US);
Elad Alon, El Cerrito, CA (US);
Oracle America, Inc., Redwood Shores, CA (US);
Abstract
An optical receiver is described. This optical receiver includes a digital feedback circuit that biases a front-end circuit, which receives an optical signal, so that an analog electrical signal output by the front-end circuit is calibrated relative to a reference voltage corresponding to a decision threshold of a digital slicer in the optical receiver. In particular, during a calibration mode the feedback circuit may determine and store a calibration value that calibrates the analog electrical signal relative to the reference voltage. Then, during a normal operating mode, the feedback circuit may output a current corresponding to the stored calibration value that specifies a bias point of the front-end circuit.