Optical receiver with monolithically integrated photodetector
US8787776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2011 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Oct 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6971
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.