On Fri, 12 Oct 2007 11:24:17 -0700, John Larkin
wrote:

On Fri, 12 Oct 2007 01:55:12 +0100, "john jardine"
wrote:


"The Phantom" wrote in message
. ..
As promised.


[Useful reading. But yes, there's caveats with the 'x2' limit.]

Attached, a contrived, LTspice structure, giving 2 gain.


Cool. It did seem like cascading could be done without theoretical
limit. The voltage looks like it's increasing exponentially with stage
count.

I simulated it too. John has 3 orders of magnitude increase in impedance
level per stage. With only two orders increase, the gain was around 1.8
after 7 stages. With one order increase in impedance level per stage, the
gain was decreasing with each stage except for the last stage (which is
unloaded), where the gain does increase.


I'll check Mouser for those parts.

John