Regarding data speed in a tranceiver

[Avala Lokesh]

Hi all,
I was designing a 20G tranceiver in CMOS. The data rate is not high as I expected. The input buffer and output driver looks to work for more than 10G data but when I add a bunch of inverters the speed reduces to around 4 G. the maximum data rate which can be attained seems to be limited by the inverter chain. are there any suggestions on what I can add instead of an inverter chain to still recover high speed data.(I tried dcvsl circuit also)

Thanks

 

[AMS012]

The data rate will not be limited by the inverter chain. You have to increase their strength to meet the speed.

 

[Avala Lokesh]

Thanks for the reply.
By increase the strength you mean size or voltage or what specifically?

 

[AMS012]

If you have fixed supply, increasing the size will help. The maximum supply voltage that can be used usually depends on the technology node you are designing in.