Hi all,
apologies for the n00b-ness of my question but being a first-year EE
student I haven't learned enough useful things yet to figure out the
workings of the following circuit:

http://marcel.carrietech.com/phase.png

This is a phase shifting circuit (Rv being variable) that I found
online. Could someone please explain how to calculate the output voltage
given the input voltage and the various components? I've checked all my
EE books (which are all intro level, unfortunately) and have come up dry.
Thanks,
- Marcel
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