I'm trying to build a pulsed voltage controlled current source using an op-amp. It has a tendency to oscillate (although sometimes to works okay, just often enough to give me hope that I might be close).
I'm looking to drive currents from 100 mA - 1A through a load which ranges from 12 Ω - 35 Ω. I'm using an LM675 (datasheet) because I have it at hand, and it's rated for the voltage and current. Vin is provided from a Labview-controlled DAQ. The schematic is below.
The 1 Ω resistor and 0.22 uF cap from the examples on the LM675 data sheet. I confess I don't understand stability all that well.
I've tried similar circuits with other op-amps and the past, and sometimes been sucessful, and other times encountered the same problem I have now. I'd appreciate any advice.