4. An p-channel MOSFET transistor is built in silicon with Np-5x1015cm3 and to,-

Question

4. An p-channel MOSFET transistor is built in silicon with Np-5x1015cm3 and to,-100A. The aluminium-gate Silicon MOSFET has a L-0.5?m, and w = 0.75?m, The Threshold voltage is-1 volt. When-1.5 volts is on the gate and 0.2 volts is on the drain, how many holes are at the source? the drain? What is the current? 5. For the above transistor, -1.5 volts is on the gate and -0.5 volts is on the drain, how many holes are at the source? the drain? What is the current? 6. For the above transistor, -1.5 volts is on the gate and -6 volts is on the drain, how many holes are at the source? the drain? What is the current? 7. The early voltage of the previous transistor is 50V. Find the current when: a) Varan-6V and Vate=-1.5V

Explanation / Answer

4).As the drain is connected to -0.2V and as source is floating, So the VSG = -0.2 + 1.5 = 1.3V > VTH(considered positive as Here VSG is taken instead of VGS)

So PMOS is in inversion layer.

The Number of holes at the source and Drain = ND = 5*10^{15}/cm3

Current = 0A as source is floating so no current will flow.

5).As the drain is connected to -0.5V and as source is floating, So the VSG = -0.5 + 1.5 = 1.0V = VTH

So PMOS is in inversion layer.

The Number of holes at the source and Drain = ND = 5*10^{15}/cm3

Current = 0A as source is floating so no current will flow.

6). As the drain is connected to -6V and as source is floating, So the VSG = -6 + 1.5 = -4.5V

So PMOS is in depletion layer.

The Number of holes at the source and Drain = 0 /cm3

Current = 0A as source is floating so no current will flow.

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.