EE40 Lecture 16 - DC MOSFET

EE40 Lecture 16 - DC MOSFET - EE40 Lecture 16 FET Models...

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EE40 Lecture 16 – FET Models Neel Shah 8/1/11
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Class Hand in all reading assignments and practice problems to me in class or OH by 8/10 Submit your iClicker # on HW5 and/or HW6 Final project parts arriving today Specialty parts taking a little longer to ship Guest lecture this Friday 8/5
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Field Effect Transistor P is (effectively) a high resistance block of material, so current can barely flow from + to The n region is a reservoir of extra electrons (we will discuss the role of the n region later) When C is “on”, i.e. V C is relatively positive, then electrons from inside the P region collect at bottom of insulator, forming a “channel” + V C - - - - - - - - - - - - - (Drain) (Source) (Gate) + -
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Field Effect Transistor + V C • When the channel is present, then effective resistance of P region dramatically decreases • Thus: – When C is “off”, switch is open – When C is “on”, switch is closed - - - - - - - - - - - - - (Drain) (Source) (Gate) + -
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Field Effect Transistor + V C • If we apply a positive voltage to the plus side – Current begins to flow from + to – Channel on the + side is weakened - - - - - - (Drain) (Source) (Gate) + - + -
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iClicker: MOSFET Switch Review What kind of gate is this? A: AND B: NAND C: OR D: NOR E: NOT
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iClicker: MOSFET Switch Review What is the output function of this setup? A: (A * B) + C + D B: (A * B) + C + D C: (A + B) * C * D D: (A + B) * C * D E: (A * B) (C + D)
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iClicker: MOSFET Switch Review How can we convert this
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This note was uploaded on 09/09/2011 for the course EECS 40 taught by Professor Chang-hasnain during the Summer '08 term at University of California, Berkeley.

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EE40 Lecture 16 - DC MOSFET - EE40 Lecture 16 FET Models...

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