In circuits where there is no input signal shown explicitly as in the figure shown below, how do we determine the behaviour of the circuit? I understand that the power supply given to the opamps drives the circuit, but don't know exactly how we consider their effects initially. I'd like to know how we take initial conditions into the equations at different nodes(say Vout, here)
Have a look at the configuration of OA2. (You should have labeled all the components.)
- Do you recognise the configuration?
- If not, is there anything unusual about the feedback?
- If that gives you a clue then what will be the nature of the output of this part of the circuit.
- What is OA1 doing?
- Do you recognise its configuration?
When you put the two together what happens?
Assume some non-zero Vout initially and see what the maths tells you.