# ch 4.txt

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1. 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
2. What is a transistor?
A transistor is a relatively inexpensive mechanism for implementing boolean operators in circuitry.
3. Describe how to create a NOT gate using transistor(s).
4. Describe how to create a NAND gate using transistor(s).
5. Describe how to create a AND gate using transistor(s).
6. Describe how to create a NOR gate using transistor(s).
7. Describe how to create a OR gate using transistor(s).
8. 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.
9. What is an S-R latch?

## Card Set Information

 Author: dimeng ID: 295299 Filename: ch 4.txt Updated: 2015-02-08 23:23:43 Tags: diane cs111 Folders: diane,cs111 Description: Diane cs111 ch4 Show Answers:

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