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This work reports an 8-lane single-ended RX featuring compact and low power far-end crosstalk (FEXT) cancellation circuits. The RX data-path consists of a cross continuous-time linear equalizer (XCTLE) to remove FEXT by nearest aggressors within the channel bundle. Residual post-cursor FEXT is suppressed by a direct feedback 7×8-tap cross decision-feedback equalizer (XDFE). A CTLE and 8-tap DFE equalize...
We address a hierarchical synchronization distribution architecture for high-performance and low-latency operations. Furthermore, the bandwidth overhead is minimized, and the accuracy can be adjusted to the application. A novel signaling channel with an open, user-extendable protocol is proposed. An approximation method to estimate system-wide clock jitter is introduced and applied to the optical...
We report a fibre-tapping element which uses part of the insertion loss of a fibre connector or splice as useful optical signal power. A tapping fraction of up to 70% has been measured with a total insertion loss of 0.22 dB.
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