- #1

hugo_faurand

- 62

- 10

I'm working with a piezoelectric cell and I need to retrieve the variation of the charge of the cell as a voltage signal.

I found this circuit (a charge amplifier) with an OP Amp ( here the piezo cell is represented as the current source with the capacitor and the resistor on the left).

I want to analyze the behaviour of the circuit and plot Bode diagrams for the V_out, but I'm not familiar with OP-amp.

I tried to do what I knew and starting with calculating the equivalent inductance of C_f and R_f but then I don't know how to go about with the current source and the Op-Amp.

So if you can give me some clues to continue my work, please.

Thanks in advance.