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Hardware interview practice

Determine an NMOS operating region

MediumPhysical DesignSystemVerilog

An enhancement NMOS has VTH=0.4 V, VGS=1.0 V, VDS=0.2 V, and its body is tied to its source. Which statement correctly describes the device?

Choose one

Answer choices

  1. A. A gate-induced inversion channel exists and the device is in the triode/linear region because VGS>VTH and VDS<VGS-VTH.
  2. B. The oxide conducts DC gate current that directly forms the drain current path.
  3. C. The device is in saturation because any positive VDS causes pinch-off once the channel forms.
  4. D. The device is cut off because VDS is smaller than VTH.