Keep in mind that anything you connect across your tank circuit will affect its resonant frequency and Q (signal source and measuring device). You need to make sure your equipment is very loosely coupled to the UUT through small value capacitors for instance.
Didier KO4BB On April 11, 2014 3:15:37 PM CDT, Dan Kemppainen <d...@irtelemetrics.com> wrote: >Hi all, > >I'm thinking about an upcoming project, if this is off topic please >disregard or contact me off list. :) > >I have a large LC tank, with a very lossy inductor. Being driven by a >pulse width push pull driver, that is digitally controlled. The driver >circuit will couple through a N:1 transformer. I need to be able to >adjust the push/pull driver frequency to match the frequency of the >tank >circuit. (See frequency/time is involved :) ) The tank components can >vary and are not adjustable, so the drive frequency needs to vary. > >I'm thinking some sort of a phase detector may be the way to go. I'm >just not sure were to sample the V and I signals to look for phase >differences, or where to get a good clean reference from. > >So the question is, when actively driving a tank circuit, how do you >know you are driving it with the same frequency ad the same phase it >naturally oscillates at. > >Any thoughts, suggestions, or readily available papers you guy could >point me to? > >Thanks! >Dan >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
