I was handed the following circuit in order to determine what it does and what is its operating conditions. The circuit was reverse engineered from an old equipment.
I have simulated with NI Multisim v.11 and the oscilloscope shows only a constant voltage of 2.7[V], this are measured at \$C_3\$.
I need help to analyze this circuit in order to determine what it does, what is its output waveform and its operating conditions.
The op amp stage seems to me like a comparator/oscillator, it is comparing \$V_0\$ which varies over time because of the capacitors against the 2.5[V] that is a square wave generator with 5V amplitud. So is this an square wave oscillator or what? What is its output?