Hi all,
I came across a dc biasing problem of a homodyne receiver.
The output of the direct conversion mixer is connected to a VGA. The
first stage of VGA and the output of mixer have different DC biasing
values. I know common source or source follower could be used to ****ft
the DC bias. But we will lose the flexibility of tuning the biasing of
VGA during experiment.
Is there any other means to bias the VGA in this case?
thanks
fz
