Re: Differential probe design - BANDWIDTH ? ? ?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Malcolm,

At 11:10 AM 7/17/2003 +1200, you wrote:
> > >Terry,
> > >
> > >What kind of bandwidth are you getting with your differential probe
> > >design?  Did you simulate it at all?
> >
> > It has never been built...  The ICs go to 150MHz.
>
>What is the target gain of the circuit at what -3dB frequency? The
>150MHz thing will be -3dB -at- unity gain.
>
>Malcolm
>

The gain is 0.001 ;-))  But probably would us the unity gain numbers in our 
case.  We could really get by fine with 1MHz bandwidth.  Here is my 
"original" TL082 circuit:

http://hot-streamer-dot-com/temp/DiffProbe01.gif

But everyone wanted far better common mode rejection and higher 
frequency.  So I am pushing it for all it's worth ;-))

Cheers,

         Terry