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.
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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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