Why A Multi-Protocol PMA?

[@abhiruplahiri1]

That's a nice video CC. We can do one octave tuned PLL (1:2), we can possibly generate any lower freq. by div 2, 4...etc. The challenge of course is to do a 1:2 LC VCO with good phase noise. May be food for thought for another video 😀 For lower speed multi-protocol use cases, may be ring VCO is already good enough, any inputs?

[@circuitimage]

Hi Abhirup, thanks for the nice feedback. Your experiences match what I have. My understanding is the NRZ up to 32Gbps, the ring VCO is already good enough, but not good enough for the PAM4 SerDes above 56Gbps. Therefore, the :2 LC VCO with good phase noise is Challenge. :)

[@abhiruplahiri1]

@@circuitimage thanks for the input CC.

[@circuitimage]

@@abhiruplahiri1 you're very welcome. :)