Hi all, I'm new here.
I was looking around to find some circuits to build an AC constant current source.
The circuit is needed to inject current into samples of different materials and take resistivity measurements.
I found the circuit in the attachment and I was wondering if it's too complicated changing from dual supply to a single supply.
The signal gen at the input will be replaced to an 20-50 Hz oscillator, probably built using an opamp with single suply too.
the current needed at the output will be variable from few mA to say few hundred milliamps. The sample under test is represented in the circuit by R6.
The reason of the supply conversion is the option to have portable device operated with battery.
Suggestion about different designs are welcome
Thankyou for you help,
Vince