A 12-Gb/s 11-mW Half-Rate Sampled 5-Tap Decision Feedback Equalizer With Current-Integrating Summers in 45-nm SOI CMOS Technology

Design Techniques for High-Speed I/Os: Challenges and Opportunities

“…To speed up multiplication and summation operations, current-steering multiplication is widely used for its speed. For the same reason, current mode summation including current-integrating summers that offer the key advantage of high-speed and low power consumption is widely preferred [52,[67][68][69].…”

Current-Integrating DFE with Sub-UI ISI Cancellation for Multi-Drop Channels

“…The DFE cancels post-cursor ISIs without high-frequency noise enhancement. Although the current integration is very effective for eliminating the high-frequency noise, the integrator output may not provide with a sufficient integration amplitude when the input data changes at every cycle, resulting in BER degradation [3]. Moreover, the latency of the first feedback tap in the DFE may sacrifice the effective integration time, which lead to further reduction of integration amplitude [4].…”

“…Several approaches have been proposed to alleviate problems due to feedback tap latency and input pattern dependency [3,5], but have their own demerits. Softdecision method in [3] can alleviate the effect of the feedback latency, but should use a current-mode logic (CML) that causes high power consumption and cannot work as a high-sensitivity sampler.…”

“…Softdecision method in [3] can alleviate the effect of the feedback latency, but should use a current-mode logic (CML) that causes high power consumption and cannot work as a high-sensitivity sampler. Moreover, CML is not compatible with traditional CMOS clocking.…”

A 10 Gb/s Equalizer in 0.18m CMOS Technology for High-speed SerDes

“…The DFE can eliminate post-cursor ISI without amplifying noise and crosstalk. However it may introduce the problem of error propagation [1][2][3]. From above viewpoint, this paper presents a 10 GB/s equalizer consisting of a linear equalizer and a nonlinear DFE in receiver for better equalization performance.…”