Gimeno C., Celma S., Aldea C. CMOS Continuous-Time Adaptive Equalizers for High-Speed Serial Links

Springer International Publishing, 2015. — XXII, 148 p. — (Analog Circuits and Signal Processing). — ISBN: 978-3-319-10563-5, 978-3-319-38485-6, 978-3-319-10562-8.This book introduces readers to the design of adaptive equalization solutions integrated in standard CMOS technology for high-speed serial links. Since continuous-time equalizers offer various advantages as an alternative to discrete-time equalizers at multi-gigabit rates, this book provides a detailed description of continuous-time adaptive equalizers design - both at transistor and system levels-, their main characteristics and performances. The authors begin with a complete review and analysis of the state of the art of equalizers for wireline applications, describing why they are necessary, their types, and their main applications. Next, theoretical fundamentals of continuous-time adaptive equalizers are explored. Then, new structures are proposed to implement the different building blocks of the adaptive equalizer: line equalizer, loop-filters, power comparator, etc. The authors demonstrate the design of a complete low-power, low-voltage, high-speed, continuous-time adaptive equalizer. Finally, a cost-effective CMOS receiver which includes the proposed continuous-time adaptive equalizer is designed for 1.25 Gb/s optical communications through 50-m length, 1-mm diameter plastic optical fiber (POF).Equalization for High-Speed Serial Links.
Objectives.
Book Organization.Theoretical Study of Continuous-Time Equalizers.
Basic Theory.
Power Spectral Density of NRZ Data Encoding.
Unified Model for CT Equalizers in the Frequency Domain.
Loop Filter Selection Criteria.
Conclusions.Continuous-Time Linear Equalizers.
Degenerated Differential Pair.
Split-Path Equalizer.
Comparative Analysis.
Experimental Verification.
Conclusions.Adaptation Loop.
Design of the Adaptation Loop.
Experimental Measurements.
Conclusions.Receiver Front-End for 1.25-Gb/s SI-POF.
Receiver Front-End Architecture.
Experimental Verification.
Conclusions.Conclusions.
General Conclusions.
Further Research Directions.Appendix: Plastic Optical Fibers.
Index.