Electronic – N channel depletion FET vs P channel enhancement Operation

mosfet

As the title implies I am confused about the electrical characteristics of N channel depletion FETs vs P channel enhancement mode fets. Won't both of these devices act similarly as they both have negative threshold voltages? Thanks!

Best Answer

Although both have negative threshold, the operation is still opposite. For N-channel, the gate voltage must be above the threshold voltage to allow conduction through the channel. For P-channel, the gate voltage must be below the threshold voltage to allow conduction.