I'm trying to find the model parameters for CTLE, DFE, VGA, etc., for an 112 Gb/s PAM4 Serdes that supports an insertion loss of 35 dB.

I'm trying to find the model parameters for CTLE, DFE, VGA, etc., for an 112 Gb/s PAM4 Serdes that supports an insertion loss of 35 dB. However, the two examples provided by MATLAB only have an insertion loss of 16 dB. If I directly increase the insertion loss to 35 dB, the eye diagram won't open at all（SNR is very low）.Could anyone provide relevant cases?

Architectural 112G PAM4 ADC-Based SerDes Model

CEI-112G-VSR Transmitter/Receiver IBIS-AMI Model

Answer 1

[liang]

help me