Re: Differential probe design - BANDWIDTH ? ? ?

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

Original poster: "Malcolm Watts by way of Terry Fritz <teslalist-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

On 16 Jul 2003, at 15:16, Tesla list wrote:

 > Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
 >
 > Hi Dan,
 >
 > At 02:57 PM 7/16/2003 -0400, 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

 >
 > >Also, not sure exactly what your schematic / design looks like, but you
 > >should probably try to put a lot of compensation
 > >networks (basically R/C branches etc...) into the design (even if you
 > >aren't using them right now) just in case you
 > >need to tweak the frequency response once its built (which is very
 > >common).
 >
 > http://hot-streamer-dot-com/temp/DiffProbe-5.gif
 >
 > http://hot-streamer-dot-com/temp/DiffProbe-5p.gif
 >
 > Since we are trying for pretty high frequency, we can't add too many
 > "hooks" for compensation.  Just going to have to try it and see...
 >
 > Cheers,
 >
 >          Terry
 >
 >
 >
 > >The Captain
 >
 >
 >