1. The problem statement, all variables and given/known data I need to characterize the circuit below in order to compare measured data to theory. Can you determine any the theoretical relationships for the frequency, amplitude, gain of the two voltage outputs? I measured the output voltage of each op-amp while varying both of the variable resistors individually. I can't seem to find any theoretical relationships for this circuit online, and I definitely don't have the knowledge to do it myself. Source: http://www.unirioja.es/cu/lzorzano/OPAMPcollection.pdf 2. Relevant equations Don't know. 3. The attempt at a solution Don't know what to do.