Numerical derivation of IV curve is always a possibility to deduce dI/dV graph.
How to measure in directly in voltage bias mode?
What concept is required for it?
What instrument are required to measure dI/dV?
https://capricorn.bc.edu/wp/zeljkoviclab/research/scanning-tunneling-microscopy-stm/
Dear Vibha,
The incremental conductance dI/dV can be measured by first setting a DC operating point, Then one inject a small signal ac current in the device I= Im sinwt
and measure the resulting ac voltage Vm sinwt across the device by an AC voltmeter. One uses low frequency as possible.
One then calculates the the differential conductance by dividing Im/Vm.
For more information about parameters measurements please follow the paper in the link: Method Measuring the small signal and switching parameters of diodes
Best wishes
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