EE 212 Lab
Prelab 12: Wien Bridge and Phase Shift Oscillators

Find the transfer function
V_{out}(jω)/V_{in}(jω) for the
circuit shown in figure 1 of the lab (where complex frequency variable s
= jω 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
V_{out}(jω)/V_{in}(jω) being a
real negative number.) What is the gain of the circuit?