AnsweredAssumed Answered

HMC960 external bias

Question asked by alexeyklimov on Jan 17, 2018
Latest reply on Jan 17, 2018 by alexeyklimov



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.