deburgess

Currently, I am using an Analog Discovery 3 to study a nonlinear oscillator circuit based on a lambda diode. I would like to directly measure current without adding a resistor (which would alter the parameters of the circuit and could qualitatively change its behavior). In addition, I would like to study non-periodic waveforms (including chaos) created by driving the oscillator with a function generator. Can you give me some general advice about the test equipment I should use to directly measure and log current? In addition, what should I use as a function generator to create at least a 10-V ramp? (The arbitrary wave generator on the AD3 is great, but is limited to a 5V amplitude? thank you very much, Don Burgess