Solve RC Op-Amp Circuit Connected in a Non-Inverting configuration

[astonmartin]

How would you solve an RC op-amp circuit connected in a non-inverting fashion, such that the second resistor is replaced by a capacitor. This is not the usual differentiator or integrator circuit as far as I can tell?

No specific problem, just generally speaking, how would you approach this

 

[berkeman]

How would you solve an RC op-amp circuit connected in a non-inverting fashion, such that the second resistor is replaced by a capacitor. This is not the usual differentiator or integrator circuit as far as I can tell?

No specific problem, just generally speaking, how would you approach this

Can you post a sketch of the circuit? I think I can picture what you are asking, but it would be good to be more clear.

In general, you solve all opamp circuits the same way. Assume that there is no voltage between the + and - inputs, by virtue of the high negative feedback gain of the opamp, and assume that there is no input current into the + and - inputs. If there are inductors or capacitors in the circuit, you use the differential or integral relationship between their current and voltage as part of the circuit equations. I usually use KCL equations and solve them.

Then you go back and factor in the non-infinite gain of the opamp, and the non-zero input bias currents, the input offset current and voltage, etc., if applicable to the problem.

 

[Mene]

?

To solve an RC op-amp circuit connected in a non-inverting configuration with a capacitor in place of the second resistor, I would first analyze the circuit using Kirchhoff's laws and Ohm's law to determine the current and voltage at each node. I would then use the ideal op-amp assumptions to simplify the circuit and calculate the gain and frequency response of the circuit.

Next, I would consider the behavior of the capacitor in the circuit and how it affects the overall circuit response. Depending on the specific values of the components and the frequency of the input signal, the capacitor may act as a high-pass filter, low-pass filter, or band-pass filter.

If the circuit is intended to function as a differentiator or integrator, I would also need to take into account the effects of the capacitor on the differentiation or integration of the input signal. This may require additional analysis and calculation.

Overall, the approach to solving this type of circuit would involve a combination of circuit analysis techniques, knowledge of op-amp behavior, and an understanding of the behavior of capacitors in circuits. It may also require simulation or experimentation to verify the results and optimize the circuit design.