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Applet Worksheet

[This worksheet may be suitable for Computer Lab Recitation or for Homework assignment for introductory-level microelectronics courses.  If you like, here is a MS Word file of this worksheet for three MOSFET applets.]

I. MOSFET: ON or  OFF
Applet: http://jas.eng.buffalo.edu/education/mos/mosfet/v11/mos_0.html

1. N-Channel

• i) Applet Preparation:  Select N-channel and Set Vt = 2V   ==>  Press Vg UP or DOWN and Observe the Channel region of mosfet
• ii) What is the minimum Gate voltage Vg for the Channel to form ?  Or equivalently, what is the maximum Gate voltage for the Channel to be off ?

•             Vg = (     ) Volts
• iii) From above, what is the relationship of Vg and Vt for the N-channel to form ?

•          Vg  vs. Vt:   (                                            )
• iv) For the N-channel MOSFET, circle the correct answer below:
• a) Si substrate is:  N-type or P-type     (circle one)
• b) Source & Drain regions of Si are: N-type or P-type (circle one)
• c) The Charge carriers in the Channel are: electron or hole. (circle one)

2. P-Cahnnel

• v) Applet Preparation:  Select P-channel and Set Vt = - 2V   ==>  Press Vg UP or DOWN and Observe the Channel region of mosfet
• vi) What is the maximum Gate voltage Vg for the Channel to form ?  Or equivalently, what is the minimum Gate voltage for the Channel to be off ?

•            Vg = (     ) Volts
• vii) From above, what is the relationship of Vg and Vt for the P-channel to form ?

•           Vg  vs. Vt:   (                                            )
• viii) For the P-channel MOSFET, circle the correct answer below:
• d) Si substrate is:  N-type or P-type (circle one)
• e) Source & Drain regions of Si are: N-type or P-type (circle one)
• f) The Cahrge carriers in the Channel are: electron or hole. (circle one)