I-V curve tracing for transistors is easily accomplished with the SpikeSafe SMU. The SpikeSafe’s short pulsing capability allows the true I-V curve to be obtained without distortion caused by heating. The graphs below show the I-V characteristic for an N-Channel MOSFET taken with an external voltage source driving the gate. As you can see the plots, taken with a pulse width of 20us, closely match the manufacturer’s datasheet.
The third graph shows the adverse impact of device heating when slower pulses are used. For this graph the gate voltage is kept constant at 5V. You can see that wider pulses produce greatly distorted curves.