Abstract
In this chapter, the principles of continuous-time adaptive equalization will be explored. First, basic theory of continuous-time equalization will be analyzed, focusing on its transfer function and how it should compensate the response of the channel. Second, the power spectrum characteristics of the transferred data will be analyzed, focusing on the non-return-to-zero (NRZ) data encoding and pseudo random bit sequence (PRBS) , which is the typical signal used to test serial communication prototypes. Next, a thorough and unified analysis of continuous-time adaptive equalizers that will lead to a set of design criteria to select the proper bandwidth of the filters used in the adaptation loop will be presented. It has into account the characteristics of the communications system such as the data rate, channel bandwidth and the specific line equalizer used. After this analysis, a functional simulation of continuous-time adaptive equalizers will be presented to determine which filters are preferred in the adaptation loop . Finally, some conclusions of the chapter will be drawn.
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Notes
- 1.
The transition time is defined as the time taken by the signal to change from a specified low value to a specified high value or vice versa. In our case, these values are 10 and 90 % of the step height.
- 2.
Variance: Difference between the maximum and minimum value in the stationary state.
References
W. Beyene, The design of continuous-time linear equalizers using model order reduction techniques, in Proceedings of IEEE Electrical Performance of Electronic Packaging (IEEE-EPEP), pp. 187–190, Oct 2008
W.-Z. Chen, S.-H. Huang, G.-W. Wu, C.-C. Liu, Y.-T. Huang, C.-F. Chiu, W.-H. Chang, Y.-Z. Juang, A 3.125 Gbps CMOS fully integrated optical receiver with adaptive analog equalizer, in IEEE Asian Solid-State Circuits Conference 2007 (ASSCC’07), pp. 396–399, Nov 2007
K.-H. Cheng, Y.-C. Tsai, Y.-H. Wu, Y.-F. Lin, A 5-Gb/s Inductorless CMOS adaptive equalizer for pci express generation II applications. IEEE Trans. Circuits Syst. II Express Briefs 57(5), 324–328 (2010)
A.A. Fayed, M. Ismail, A low-voltage low-power CMOS analog adaptive equalizer for UTP-5 cables. IEEE Trans. Circuits Syst. I Regul. Pap. 55(2), 480–495 (2008)
C. Gimeno, E. Guerrero, C. Aldea, S. Celma, A 2.5 Gb/s low-voltage CMOS fully-differential adaptive equalizer, in Proceedings of 2013 SPIE Microtechnologies Conference (SPIE 2013), pp. 876402-1–876402-8, Apr 2013
C. Gimeno, C. Sánchez-Azqueta, E. Guerrero, C. Aldea, S. Celma, A 1-V 1.25-Gbps CMOS analog front-end for short reach optical links, in IEEE European Solid-State Circuits Conference (ESSCIRC2013), pp. 339–342, Sept 2013
S. Gondi, B. Razavi, Equalization and clock and data recovery techniques for 10-Gb/s CMOS serial-link receivers. IEEE J. Solid-State Circuits 42(9), 1999–2011 (2007)
J.W. Goodman, Statistical optics (Wiley, New York, 1985)
G. Hartman, K. Martin, A. McLaren, Continuous-time adaptive analog coaxial cable equalizer in 0.5 µm CMOS, in Proceedings of the 1999 IEEE International Symposium on Circuits and Systems (ISCAS99), pp. 97–100, Jul 1999
S. Haykin, Communication Systems, 4th edn (Wiley, New York, 2001)
T. Hollis, D. Comer, Mitigating ISI through selfcalibrating continuous-time equalization. IEEE Trans. Circuits Syst. I Regul. Pap. 53(10), 2234–2245 (2006)
D. Hong, S. Saberi, K.-T. Cheng, C. P. Yue, A two-tone test method for continuous-time adaptive equalizers, in Efficient Test Methodologies for High-Speed Serial Links (Springer, Berlin, 2010), pp. 75–87
L. Hoon, H. Gunhee, A low power and small area analog adaptive line equalizer for 100 Mb/s data rate on UTP cable. IEICE Trans. Electron. 87(4), 634–639 (2004)
J. Lee, A 20-Gb/s adaptive equalizer in 0.13-µm CMOS technology. IEEE J. Solid-State Circuits 41(9), 2058–2066 (2006)
D. Lee, J. Han, G. Han, S.M. Park, 10 Gbit/s 0.0065 mm2 6 mW analogue adaptive equalizer utilising negative capacitance, in IEEE International Solid-State Circuits Conference (ISSCC), pp. 190–191, Feb 2009
Maxim Integrated Products, 3.2 Gbps Equalizer and Cable Driver (2005)
C. Sánchez-Azqueta, S. Celma, A phase detection scheme for clock and data recovery applications, in Proceedings of the 20th IEEE European Conference on Circuit Theory and Design (ECCTD2011), pp. 130–133, Aug 2011
C. Sánchez-Azqueta, C. Gimeno, S. Celma, A comparative study of continuous-time analog adaptive equalizers, in Proceedings of the 2013 SPIE Microtechnologies Conference (SPIE 2013), vol. 8764, pp. 876402-8, Apr 2013
C. Sánchez-Azqueta, C. Gimeno, E. Guerrero, C. Aldea, S. Celma, Design considerations for loop filters in continuous-time adaptive equalizers, in Proceedings of the International Multi-Conference on Systems, Signals and Devices (SSD 2014), Feb 2014
D.H. Shin, J.E. Jang, F. O’Mahony, C.P. Yue, A 1-mW 12-Gb/s continuous-time adaptive passive equalizer in 90-nm CMOS, in Proceedings of the IEEE Custom Integrated Circuits Conference (CICC09), pp. 117–120, Sept 2009
R. Sun, A low-power 20-Gb/s continuous-time adaptive passive equalizer. Thesis, B.S. Tsinghua University 1999, Dec 2005
K. Yoo, G. Han, H. Yoon, Convergence analysis of the cascade second-order adaptive line equalizer. IEEE Trans. Circuits Syst. II Express Briefs 53(6), 507–511 (2006)
G.E. Zhang, M.M. Green, A 10 Gb/s BiCMOS adaptive cable equalizer. IEEE J. Solid-State Circuits 40(11), 2132–2140 (2005)
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Gimeno Gasca, C., Celma Pueyo, S., Aldea Chagoyen, C. (2015). Theoretical Study of Continuous-Time Equalizers. In: CMOS Continuous-Time Adaptive Equalizers for High-Speed Serial Links. Analog Circuits and Signal Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-10563-5_2
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