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Unit 8: Memory

5. A 4-bit binary number Y = y3y2y1y0 is to be multiplied by a 3-bit binary number X = x2x1x0. Notes
Use two 4-bit adders and other gates that you might need to implement this operation, and
draw the corresponding diagram.
6. Define programmable logic array (PLA). And draw the circuit diagram.
7. What do you understand by read-only memory (ROM).
8. Write a short note on tunneling.
9. Describe erasable programmable read-only memory (EPROM).
10. What are EPROM chips?

Answers to Self Assessment
1. (a) 2. (a) 3. (b) 4. (b) 5. (a)
6. (b) 7. (c) 8. (d) 9. (a)

8.12 Further Readings

Switching Theory: Insight Through Predicate Logic, by Shimon Peter Vingron.
Absolute Beginner’s Guide to Computer Basics, by Michael Miller.

www.top-windows-tutorials.com/computer-basics.html

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