Digital automatic gain control apparatus and method in burst mode optical receiver
US8660439B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 5, 2006 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Apr 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/66
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transimpedance amplifier for a burst mode optical communication converts a burst current signal into differential output voltage signals. Using a multi-level digital AGC mechanism, the transimpedance amplifier is rapidly adapted to a burst signal whose amplitude varies in a wide range. By using an adaptive level detection method, a multi-level digital AGC can be implemented without using ADC. In addition, because the transimpedance amplifier uses a selective reset generation scheme that performs a reset operation for itself after a high power burst, a burst mode operation can be performed without external reset signals. Accordingly, the transimpedance amplifier can be integrated with an optical detector within a TO-can. Furthermore, the transimpedance amplifier can have the burst mode capability and the best sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.