Isn't the output suppose to be voltage? Isn't that what a transimpedance amplifier does?because the output is a current - not a voltage
Do you mind telling me where I am wrong? I have checked again, it is similar to the VOLTCON moduleHi,
I don´t think the schematic of post#1 matches the VOLTCON circuit.
Klaus
Why do you talk about an OTA?An "Integrated OTA"
How do you know?The second SMD part is a V regulator on the board.
TY for the error correction.Why do you talk about an OTA?
OTA inside an OPAMP or not: A TIA usually is explained as a usual OPAMP circuit.
And due to the feedback the output appears like a voltage output.
Klaus
I totally agree. I don't like guessing either, so I avoid it wherever possible.Guessing, and I have been guilty of it, is not good engineering practice.
Which info are you doubting?How do you know?
My guess is that it is a two stage circuit:
Current input --> TIA (range setup) --> Variable gain (pot 0...100%) --> output
Klaus
I don´t doubt it now,Which info are you doubting?
While not impossible ..If POT1 is parallel with the opamp output, it changes the output impedance. By decreasing POT1, you lower the impedance, which increases the current through the feedback resistor, thus increasing the gain. It's crucial to balance this, as too low impedance can worsen the circuit's stability.
Remember to check the values on the datasheet and choose the components accordingly. You can experiment at this stage, but do so carefully! Good luck!
Bob
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