By Cecilia Gimeno Gasca, Santiago Celma Pueyo, Concepción Aldea Chagoyen
This booklet introduces readers to the layout of adaptive equalization recommendations built-in in general CMOS expertise for high-speed serial hyperlinks. because continuous-time equalizers provide a variety of merits instead to discrete-time equalizers at multi-gigabit premiums, this e-book presents a close description of continuous-time adaptive equalizers layout - either at transistor and method levels-, their major features and performances. The authors commence with a whole overview and research of the cutting-edge of equalizers for wireline functions, describing why they're beneficial, their varieties, and their major purposes. subsequent, theoretical basics of continuous-time adaptive equalizers are explored. Then, new constructions are proposed to enforce the various construction blocks of the adaptive equalizer: line equalizer, loop-filters, energy comparator, and so forth. The authors show the layout of a whole low-power, low-voltage, high-speed, continuous-time adaptive equalizer. ultimately, an economical CMOS receiver along with the proposed continuous-time adaptive equalizer is designed for 1.25 Gb/s optical communications via 50-m size, 1-mm diameter plastic optical fiber (POF).
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Extra info for CMOS Continuous-Time Adaptive Equalizers for High-Speed Serial Links
N. M. Ovens, Y. Wong, J. Casasanta, A digital chip with adaptive equalizer for PRML detection in hard-disk drives, in IEEE International Solid-State Circuits Conference: Digest of Technical Papers, Feb 1994, pp. S. Abeysekera, Y. Ye, Zero based blind equalizer implementation using zero forcing, MMSE and decision feedback concepts, in Proceedings of Fifth International Conference on Information, Communications and Signal Processing, Feb 2005, pp. 96–100 [AGR12] A. F. O. Dickson, Y. A. J. Friedman, A 19-Gb/s serial link receiver with both 4-Tap FFE and 5-Tap DFE functions in 45-nm SOI CMOS.
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Typically, the design of the control loop of an adaptive equalizer using a slicer is carried out in the time domain; in contrast, adaptive equalizers based on the spectrum-balancing technique are analyzed in the frequency domain. We are going to show how, in both cases, a unified description in the frequency domain is valid. Moreover, the specific BW of the filters used to separate the frequency regions for comparison is typically set ad hoc, after a trial and error process.
CMOS Continuous-Time Adaptive Equalizers for High-Speed Serial Links by Cecilia Gimeno Gasca, Santiago Celma Pueyo, Concepción Aldea Chagoyen