UMBC CMSC 313, Computer Organization & Assembly Language, Fall 2003, Section 0101

Transistors & Logic Gates

Thursday 10/23, 2001

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Assigned Reading in Murdocca & Heuring:  A.4-A.7

Assigned Reading in Neveln:   

Assigned:  hw3

Due:   

Topics Covered:

• Slides are available in PDF: Slides16.pdf
• Postulates and theorems of Boolean Algebra. Simplifying the formula for MAJ3.
• How to make transistors from semiconductors. We followed some web pages for this. Here are the links:
  • A relay as an example of an electronic switch
  • The periodic table of elements
  • Intrinsic semiconductors
  • The doping of semiconductors
  • The P-N junction
  • Forward and reverse biased P-N junctions
  • The field-effect transistor
  • Inversion channel and threshold voltage (This was the Java applet that let's you control the voltage at the gate of a MOSFET transistor and see how it affects the current through the other two terminals.)
• Using MOSFET to construct CMOS logic NOT, NAND and NOR gates.
• Discussed Homework 3.