I need help rectifying a very small signal, 10 - 80 mVac @ 60Hz. We are trying to measure and datalog an AC current. The current sensor is a Fluke i400s which outputs an AC mV signal proportional to the input current. Our data logger only accepts a DC signal. I've built a few precision rectifier circuits, which I found on the web, but nothing was stable at 60Hz.
I've tried using a LM324N op-amp and 1N5818 type diodes, with a wide range of resistors (1%) for the gain/feedback portion of the circuit.
Any direction, such as which op-amps, diodes to use/or avoid for this application and a schematic would be helpful.
Thanks!
I've tried using a LM324N op-amp and 1N5818 type diodes, with a wide range of resistors (1%) for the gain/feedback portion of the circuit.
Any direction, such as which op-amps, diodes to use/or avoid for this application and a schematic would be helpful.
Thanks!