piclist 2001\01\09\144817a >
Thread: PC Digitizing Storage Oscilliscope
face BY : Dan Michaels email (remove spam text)

Jinx wrote:
>Attachment Converted: C:\WIN31APP\EUDORA\ATTACH\dsofront.gif

Rich Ottosen  wrote:
{Quote hidden}

I think a good modification for the ckt shown by Sir Jinx-GFW
in his attachment might be to change R20 from 470 ohms to say
100K, and put a 20 pF cap across it, similar to what Rich shows
above. The 100K should pass along DC/low-fequencies well, and
the cap will pass the high end. You also get OV clamping without
excessively loading down the input signal. I don't think I would
want to use the SJ-GFW ckt as originally shown.

- danM

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