What is the best way to analyze most Operational Amplifier Circuits?

Answer 1

If you can identify an OP AMP circuit as one of the “3” simple configurations: Unity Gain Amplifier (Buffer), Inverting Amplifier or Non-Inverting Amplifier, just use the gain equations to determine the output voltage.

If the circuit is more complex, the procedure given below is the key to analyzing the circuit:

1^st Do your initial analysis at the v+ node to determine the v+ voltage.

2^nd Then project this v+ voltage to the v- node (for the reasons discussed in class)

3^rd Use Kirchhoff's Current Law to write an equation at the v- node and solve the resulting equation.

If you need a brief 30 minute tutoring session to explain this concept, please contact me.

Analyzing Operational Amplifier Circuits by Prof Skip Laratonda