Decision feedback equalizer (DFE) is commonly used in the receiver to cancel out the inter-symbol interference (ISI). However, the capacitive loading at the analog summing node increases with addition of each post-cursor cancellation tap, which directly impacts the bandwidth. In this paper, we propose a multi-Tap switched-capacitor (SC) topology which can cancel out multiple post-cursor content with reduced loading at the analog summing node. Simulation has been implemented in UMC65-nm SP technology for a 4-Tap system, using a triple cascaded B12" channel, having attenuation of 19 dB at nyquist frequency of 2 GHz. Improvements in eye height up to 84% is observed for the eye diagram at the summing node with 4-Tap cancellation compared to 1-Tap cancellation. © 2016 IEEE.
cited By 0; Conference of 59th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2016 ; Conference Date: 16 October 2016 Through 19 October 2016; Conference Code:126686
N. A. Jacob, James, D., and Sahoo, B. D., “Full-rate switched capacitor multi-Tap DFE for long-Tail post-cursor cancellation”, in Midwest Symposium on Circuits and Systems, 2017.