Wednesday, June 14, 2017

Dependent Sources and MOSFETs

 Circuit diagram, where MOSFET receives variable gate supply voltage
and the resultant drain current may be found

The implemented circuit, with current measurement while MOSFET is in saturation.

 Collected data, consisting of supply voltages and corresponding current measurements.

Plot of data.

Summary

While a relationship between gate voltage and drain current can be seen, the collected data does little to reveal its nature. From our knowledge of semiconductors, it is likely that the MOSFET turned on and promptly entered the saturation region as gate voltage was increased. As a result, we do not have enough information to confirm the behavior of the MOSFET as a voltage controlled current source nor can we calibrate operation were we to implement it into a larger circuit. This could be rectified by revisiting the experiment and selecting finer voltage steps within the active region.

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