EE 212 Lab
Prelab 12: Wien Bridge and Phase Shift Oscillators
Find the transfer function
for the circuit shown in figure 1 of the lab (where complex frequency variable
s = jw can be substituted for ease of
analysis.) Calculate values for R and C such that the phase shift between
the output and input is zero for an input frequency of 10kHz. What is the
amplitude ratio (gain) of the output to the input at this frequency.
The RC network in figure 3 of the lab can produce a phase shift of 180°
at a desired frequency. Calculate this frequency for the network values given.
(Recall a 180° phase shift corresponds to the transfer function
being a real negative number.) What is the gain of the circuit?