Please help with anything you can. Please show work. Determine the operating reg

Question

Please help with anything you can. Please show work.

Determine the operating region and drain current for the following transistors. If the transistor is in saturation or triode, determine the drain voltage which is the boundary between those two regions. If the transistor is in cutoff, determine the gate voltage which is the edge of cutoff. The channel length is the minimum value. The NMOS width is 0.90 urn and the PMOS width is 1.8 mu m. The channel length is 0.18 mu m in all cases. Numerical answers to check your work: (a) drain voltage boundary = 1.00 V, ID = 204 mu A (f) drain voltage boundary = 0.800 V, ID = 384 mu A

Explanation / Answer

sol)

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 1.1-0 = 1.1

          assuming Vt = 1V

            Vgs-Vt = 1.1-1 =0.1 which is greaterthan zero

             i.e the transistor is on

   now to know linear or saturation Vds = Vd-Vs = 1.8-0 = 1.8

                    Vds > Vgs-Vt so trasistor is in saturation

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 0.2-0 = 0.2

           assuming Vt = 1V

            Vgs-Vt = 0.2-1 =-0.8 which is lessthan zero

             i.e the transistor is in cutoff, the edge of cuttoff is 1V

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 1.8-0 = 1.8

          assuming Vt = 1V

            Vgs-Vt = 1.8-1 =0.8 which is greaterthan zero

             i.e the transistor is on

   now to know linear or saturation Vds = Vd-Vs = 1.8-0 = 1.8

                    Vds > Vgs-Vt so trasistor is in saturation

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 1.5-0 = 1.5

          assuming Vt = 1V

            Vgs-Vt = 1.5-1 =0.5 which is greaterthan zero

             i.e the transistor is on

   now to know linear or saturation Vds = Vd-Vs = 0.8-0 = 0.8

                    Vds > Vgs-Vt so trasistor is in saturation

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 0.7-1.8 = -1.1

          assuming Vt = 1V

            Vgs-Vt = -1.1-1 =-2.1 which is lessthan zero

             i.e the transistor is on

   now to know linear or saturation Vds = Vd-Vs = 0.6-1.8 = -1.2

                    Vds > Vgs-Vt so trasistor is in linear

           

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 1.5 -1.8 = -0.3

          assuming Vt = 1V

            Vgs-Vt = -0.3-1 =-1.3 which is lessthan zero

             i.e the transistor is on

   now to know linear or saturation Vds = Vd-Vs = 1-1.8 = -0.8

                    Vds > Vgs-Vt so trasistor is in linear

fig(1) to know the transistor in which region we shall find Vgs

              Vgs = Vg-Vs = 0.7-1.8 = -1.1

          assuming Vt = 1V

            Vgs-Vt = -1.1-1 =-2.1 which is lessthan zero

             i.e the transistor is on

   now to know linear or saturation Vds = Vd-Vs = 1.5-1.8 = -0.3

                    Vds > Vgs-Vt so trasistor is in linear

here the trasistor operation mainly depends on threshold voltage as it is not given

i have assume it as 1 if we take some other value the region of operation may be different

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