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—A folded multitap transmitter equalizer and multitap receiver equalizer counteract the losses and reflections present in the backplane environment. A flexible 2-PAM/4-PAM clock data recovery circuit uses select transitions for receive clock recovery. Bit-error rate less than 10 15 and power equal to 40 mW/Gb/s has been measured when operating over a 20-in(More)
To achieve high bit rates link designers are using more sophisticated communication techniques, often turning to 4PAM transmission or decision-feedback equalization (DFE). Interestingly, with only minor modification the same hardware needed to implement a 4PAM system can be used to implement a loop-unrolled single-tap DFE receiver. To get the maximum(More)
Common-mode signaling is effectively used to create a backchannel communication path over the existing pair of wires for a self-contained adaptive differential high-speed link transceiver cell [1]. A transceiver chip was designed in 0.13µm CMOS to demonstrate the feasibility of simultaneous differential and common-mode signaling. The design uses a(More)
To address the increasing demand but potential power/area penalties of implementing ADC-based high-speed serial receivers, this paper analyzes the performance benefit of using non-uniform quantization and describes a way of determining the optimal set of ADC quantization thresholds. In contrast to common wisdom, the ADC thresholds for the minimum bit-error(More)
A new 1-tap predictive decision feedback equalizer (prDFE), implemented in 40-nm CMOS LP process, achieves 27-Gb/s operation with 0.41-mW/Gb/s power efficiency. The prDFE employs a novel quad-data rate sampling architecture to improve power efficiency while minimizing critical feedback path timing constraint of the equalizer to enable post-cursor(More)
This paper describes a 16-Gb/s differential bidirectional I/O transceiver cell in an emulated 40nm DRAM process that has a fan-out of four inverter delay (FO4) of 45ps, resulting in a bit time that is only 1.4 FO4 delays long. The transceiver implements several techniques to achieve low jitter despite the slow process and constrained power consumption,(More)