Hi everyone,
According to the demo manual DC2591A, the EasySMU board is described as a 'programmable-voltage/programmable-current' source (see the attached image from the first page of the datasheet).
I assume this functionality is provided by the LT1970 Power Op Amp at the core of the board. However, I'm a bit unclear on how it's being used as a current source. From what I can see, the EasySMU code doesn’t appear to directly set an output current (by set, I mean force like an SMU would); it seems to only set a current limit (using the 'fltSetCommitCurrentSource()' and 'CommitCurrentSourceSetting()' functions).
I've run some simulations with LTSpice using the provided model of the Op Amp, but I haven't been able to achieve a constant current through any load.
Could someone clarify how the current source functionality is implemented ?
Thanks a lot !
Added the precision that I am doing simulations.
[edited by: PiR at 2:47 PM (GMT -4) on 18 Aug 2024]
