Intel® Cyclone® 10 GX Transceiver PHY User Guide

ID 683054
Date 4/14/2023
Document Table of Contents Variable Gain Amplifier (VGA)

Cyclone® 10 GX channels have a variable gain amplifier to optimize the signal amplitude prior to the CDR sampling. VGA can only be operated in manual mode. VGA gain can be selected through Quartus Assignment Editor or Quartus Setting File (qsf) or the Avalon MM register. You must set VGA manually for all combinations of CTLE modes.

Figure 173.  VGA Frequency Response for Different Gain Settings