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:
Jul. 22, 2014
Filed:
Jun. 03, 2011
Anthony Chan Carusone, Burlington, CA;
Tony Shuo-chun Kao, Sunnyvale, CA (US);
Hemesh Yasotharan, Toronto, CA;
Anthony Chan Carusone, Burlington, CA;
Tony Shuo-Chun Kao, Sunnyvale, CA (US);
Hemesh Yasotharan, Toronto, CA;
The Governing Council of the University of Toronto, Toronto, CA;
Abstract
An optical receiver includes a photodetector for detecting incoming optical data signals and an amplifier for providing signal gain and current to voltage conversion. The detection signal generated by the photodetector may include a distortion component caused by an operating characteristic of the photodetector. A signal compensating circuit may reconstruct the received optical data signal by effectively canceling the distortion component. For this purpose, the signal compensating circuit may include a decision feedback equalizer implemented using at least one feedback filter matched to the operating characteristic of the photodetector causing the signal distortion so as to reproduce the distortion component for cancellation. Use of a control module may also configure the optical receiver in real time to account for other operating and environmental conditions of the optical receiver. Data rates in excess of 5 Gbps may be realized in monolithic CMOS photodetectors when the signal compensating circuit is properly matched.