The Path to 200Gbps Serial Links

[@gabriel12002]

Hi, that's a great video. I have a question about the COM margin in min 19:19. Are you using for that metric the Rx equalizer as per 224gpbs standard? I think if the Rx eq is getting more powerful, we can improve that number. However, we also need to look at the power, it's like a trade off at the final of the day. I know it's hard, but this might allow to user higher level modulation in next generations. Thanks!

[@bholesmirnov6972]

Thanks this was really informative.. What kind of performance we expect from ADC is it like 5-6 bit flash or more complicated pipelined kind of architecture. Does ADC conversion delay hurts? What is the typical speed of DSP, It seems like this will also be really fast and closing the timing would be a challenge If there is a good reference I would love to go through that. Thanks a lot!

[@user1561]

Hi, For the ADC resolution, you need to do a system-level evaluation where depending on factors such as the channel and how complex is the equalization that you want to do in DSP domain you can get the estimate of the minimum number of ADC bits required to maintain a certain bit error rate target. But in general, what I have seen is 5-6bits ENOB time-interleaved ADC. Each of the sub-ADCs are "usually" implemented as SAR. Regarding the DSP speed, I have seen values of 750MHz, even 1GHz. In my understanding, the definition of that speed is done based on the technology node that you use (As far as I can see, nowadays the trend is 7n (even 5n) for state-of-the-art implementations). I also think that you also need to consider factors such as power consumption to define the clocking speed of the DSP logic. References for these topics I would recommend IEEE publications. the journal of solid states circuits is possibly the best journal. There is also good material in conferences such as the International solid states circuit Conference (ISSCC) or CICC. Also, I need to mention that some professors have very useful material, such as professor Sam Palermo from Texas A&M. people(dot)engr(dot)tamu(dot)edu/spalermo/ecen720(dot)html

[@StonkManOMGOMG]

@@user1561 Very informative...