Converting pdf to CAD or wmf

Hello, I need to capture some drawings from PDF and export them to AutoCAD(objects: lines, curve, circles etc. that is lossless zoom, similar to vectors) Well the creating PDF form AutoCAD is possible so is there any tool or techniques to do vise versus?
Thanks in advice, Edgar

AFAIK, there's no way to go from PDF back to DWG that restores objects like circles, arcs, other curves and text. What you'll get is a jillion little line or polyline segments. ___
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AutoCAD(objects:

what software will do it?
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There have been a number of options discussed here. Ghostscript tends to be mentioned fairly often. Do a Google search for more ideas. ___
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In Adobe Illustrator you have the option to Export *.pdf directly to *.dwg. It is correct though, that some objects consists of " a jillion" short line or pline segments after the conversion.
-- Ola H

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AutoCAD(objects:
Yes there is, but as far as I know the plugin we use at the office is tailor made for one specific type of PDF ( drawings of land parcels, from the dutch cadaster). AFAIK these are automatically generated PDF's by an online mapping service and thus are all exactly the same.. The plugin was made in-house by one of our programmers as a kind of hobby project, I can look into it for you if you want?
Sjoerd
The Netherlands