L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 7/20/2022
Public
Document Table of Contents

5.1.2.1.3. Continuous Time Linear Equalization (CTLE)

The CTLE boosts the signal that is attenuated due to channel characteristics. Each receiver buffer has independently programmable equalization circuits. These equalization circuits amplify the high-frequency component of the incoming signal by compensating for the low-pass characteristics of the physical medium. The CTLE supports AC gain and another setting called, EQ gain, that modifies the DC gain for equalization tuning.

Based on the AC gain selected, the EQ gain applies de-emphasis to the low-frequency spectrum for equalization. See the figures below for the relative effect of these settings on the frequency response of your signal.

Figure 190. Effect of AC Gain on the Frequency Response
Note: This plot was derived with EQ gain = 32. This is only an approximation and is expected to vary across PVT.
Figure 191. Effect of EQ Gain on the Frequency Response
Note: This plot was derived with AC gain = 15. This is only an approximation and is expected to vary across PVT.

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