Arria® 10 Transceiver PHY User Guide

ID 683617
Date 4/01/2024
Document Table of Contents 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 can support both DC and AC gain.

DC gain circuitry provides an equal amplification to the incoming signal across the low frequency spectrum. AC gain circuitry provides amplification to the high-frequency spectrum gain of the incoming signal.

Arria® 10 transceivers support dual mode CTLE.

High Gain Mode

High gain mode supports data rate up to 17.4 Gbps. This mode provides both AC and DC gain. There are two bandwidth settings available for this mode.

  • Full Bandwidth—This mode has a peaking frequency of 6.25 GHz offering AC gain at 17 dB.
  • Medium Bandwidth—This mode has a peaking frequency of 3.125 GHz offering AC gain at 21 dB.
Figure 229. CTLE DC and AC Gain Conceptualization

Note: Final equalization curves will be available in