please when building an inverter, what should I consider most in buying my mosfet? is it the ampere or volt or wattage of the mosfet?
It always depend on application, and the limits of the device must match it.
For small projects, the maximum drain-source and gate-source voltage rating at room temperature is enough to be taken into account(usually 5V ). But while designing a NOT gate to be built inside a processor etc, along with the above conditions, factors like maximum switching speed, time delay,ON resistance between drain and source(for noise margin), the amount of current it can source/sink to drive other inputs, temperature range,CMOS/TTL compatibility are considered.
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