Engineering OPAmp Impedance Circuit problem

AI Thread Summary
The discussion focuses on solving impedance problems related to an OpAmp circuit, specifically determining the equivalent impedance Zeq and the values of Rx, Lx, and Ry in relation to other components. The user expresses difficulty in calculating the impedance of the OpAmp circuit, despite being able to handle the equivalent circuit. Concerns are raised about the configuration of the OpAmp, particularly having both inputs inverting, which may not yield the expected results. A suggestion is made to change one input to non-inverting to align the analysis with typical expectations. The conversation emphasizes the importance of understanding the OpAmp's configuration for accurate impedance calculations.
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I'm trying to solve this problem and the first 2 questions on it are giving me a tough time. Picture Attached.

(1) Determine the equivalent impedance Zeq of the OpAmp circuit. Assume that the OpAmp
is ideal.

(2) Determine Rx, Lx, and Ry as a function of R, R1, and C such that Zeq of the equivalent
circuit is equal to Zeq of the OpAmp circuit.

any help with this is much appreciated. I can find the impedance of the equivalent circuit no problem but the opAmp version is tripping me up.
 
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forgot to attach in previous post here's picture
 

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I haven't seen an op-amp with both inputs inverting, before this. Okay, so I've lived a sheltered life. :smile:[/color]

Therefore, I have serious doubts about it giving the desired results. I think you might have to change the lower input to non-inverting (+). Does that make its analysis more in line with your expectations?
 
R and C form a potential divider, dividing the input voltage and impressing it on the (+) input of the op-amp.
 

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