On Wed, 14 Mar 2007 17:49:21 GMT, "colin"
wrote:
"Jim Thompson" wrote in
message ...
On Wed, 14 Mar 2007 08:14:59 -0700, Jitt wrote:
On Tue, 13 Mar 2007 16:29:09 +0000, ehsjr wrote:
Jim Thompson wrote:
snip
Some of us have not given you BS, and do appreciate
the teaching.
Ed
Agreed, unfortunately I never got the point Jim was
trying to make with Colin. Maybe I missed it in all the
blowing.
I was just trying to get Colin to write down the complete gain
equation... not a piece here and a piece there.
I wanted him (and all of you) to be aware of where gain was thrown
away.
but just having an equation wich says g=f(vr1) doesnt tell you that,
especially as the point you were trying to make was invalid anyway cos of
the confusion over the gain.
Colin =^.^=
In the capacitively-coupled configuration there's still 20dB tossed
that I consider unsavory.
In Graham's latest version that is DC coupled (virtual ground gimmick)
this doesn't happen.
Except for running at a risky common-mode voltage, that version is
AOK! And that problem is trivial to fix.
...Jim Thompson
--
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