Re: Phase Detector using CML
After a certain frequency, the pure digital logic style detectors will not work and the logic gates will also consume a lot of power.
CML can go upto very high frequencies since it is "current mode" and consumes the same amount of power that does not increase linearly with increasing frequency.
Since you are already at 2.5 GHz, the application does not seem to be synthesis, but CDR. Ask yourself, if your current architecture would work at 10GHz and then use a CML latch to do the job.
Hope it helps.