ch 4.txt
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Name and describe the six boolean gates that can be incorporated into circuits and can be combined to form more sophisticated operations:
 NOT  one input; inverts the input value
 AND  true only if both inputs are true
 OR  true if either (or both) operands are true
 NAND  true UNLESS both inputs are true (opposite of AND)
 NOR  true only if both inputs are false (opposite of OR)
 XOR  true only if ONE AND ONLY ONE input is true

What is a transistor?
A transistor is a relatively inexpensive mechanism for implementing boolean operators in circuitry.

Describe how to create a NOT gate using transistor(s).

Describe how to create a NAND gate using transistor(s).

Describe how to create a AND gate using transistor(s).

Describe how to create a NOR gate using transistor(s).

Describe how to create a OR gate using transistor(s).

Describe how logic gates can be used to perform simple bit addition.
 When adding binary digits there are 2 sets of two possibilities; the sum of the two digits can be 0 or 1, and the digit carried can be 0 or 1.
 Note that the sum bit can be determined using the XOR operation, while the carry bit can be determined using the AND operation.
 Multiple bit addition can be implemented by extension of this concept.
