On Aug 27, 2:54=A0am, Riad KACED <riad.ka...@[EMAIL PROTECTED]
> wrote:
> On Aug 26, 5:40=A0am, fz <fzhang...@[EMAIL PROTECTED]
> wrote:
>
> > 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
>
> Dear Fz,
>
> Did you try to ask in the following forums ?
> 1.http://www.designers-guide.org/Forum/
>
2.http://www.edaboard.com/viewforum.php?f=3D88&sid=3D3c159b2c7f9cdd4ca6c4=
8c...
>
> I would recommand these links for more design/architecture related
> questions.
>
> if you have any troubles running your design under Cadence's DFII then
> this is definitelty the right group :-)
>
> Good luck !
> Riad.
Hi Riad,
Thanks for you suggestion,
I just found this google group is a lot more convenient than those
two.
For those who are also interested in this problem, poojanwagh posted a
very good solution here:
http://www.circuitdesign.info/2008/08/calibrated-level-****fting-circuit/
fz
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