Hello. I am using HMC960 in my project and I have one question.
Why external ~2.5V bias (see img) use in input and output at the same time as CMI/Q bias is applying ?
How I know, On the enaluation board OUTPUT external bias ~2.5V don't used, but INPUT external ~2.5V bias is used.
Shall I use 1)only input or 2)only output or 3) both external bias ~2.5V in my design for correct work of HMC960 ?
Is using of CMI/Q bias necessarily ?
I use AC-coupling and common mode level doesn't matter.