3582427141
Department of Surface and Nanostructures Physics Institute of Physics UMCS
What is right feed-back?
*
electronics + mechanical parts act as low-pass filters
*
strong (fast reaction) for topographical meas. weak (slow reaction) for current measurement no feed-back for spectroscopy
The gain has to be sufficiently Iow to avoid change of the negative feed-back into positive feed-back at high freguences.
-270°
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