INA114: ina

Hi,

please post your simulation file.

Kai

Hi User,

Please upload your TINA attachment. Can you also provide detail on your circuit expectations? What is your input signal? Expected output signal?

I want to design a low-noise photoelectric detector. As the circuit shown, The light is detected by the photodiode  first,  and then the photo current is divided to DC and AC signals by the inductors (L1-4) and a capacitor (C3) for handling separately. The AC current signal flows through the inverting input terminal and is amplified by the OPA847 to measure the noise power of the injected light. The DC signal is amplified by OP27 to measure the energy level of light.try.TSC

5228.try.TSC

I have made some changes:

try_opa847.TSC

Kai

Hi,

this is a commonly used trick. It turns a circuit consisting of ideal parts into a more real circuit with parts having ohmic losses and leakage currents. This can help to make the math of simulation properly run.

Kai

Thank you Kai!

Hi User,

Looks like this is resolved, closing the thread now. Reply to re-open if you have any additional questions.