Goodmorning,

I'm a civil engineering using for the first time LTsplice for my thesis (and electronics in general).
I've already posted a thread on a part of a project that I've done thanks to you! and now i want to improve my circuit.
My goal is to take the charge from a piezoelectrics material (PVDF-TrFE), going through a charge to voltage circuit to converte q in V, then through an OpAmp to amplify the signal.
Here is a screenshot of my circuit at the moment and here's my questions:
- I've seen that the OpAmp (like OPA129) may be used also for the "charge to voltage" by using a capacitator in parallel. may i use a capacitator in parallel+resistor in parallel to do both the "charge to voltage" and amplify the signal by only one circuit? (if you post some LTsplice screenshot it would be very helpful; also if it's not possible of the series of the 2 OpAmp circuit)
- I would also like to know how may I put a charge signal into my LTsplice circuit, I've tried BI and BI2 but idk how to use it.
Thanks!

 

Please stay on one thread.

https://forum.allaboutcircuits.com/threads/generate-a-and-power-supply-from-a-single-battery.206023/