Encoding and Circuits

Question 1

Draw all the gates needed in class

Answer 1

Question 2

How do you draw a 3-input AND gate?

Answer 2

Question 3

How do you draw a 3 input nand gate?

Answer 3

Question 4

How do you draw a 3 input NOR gate?

Answer 4

Question 5

What is the difference between Combinational and Sequencial circuits?

Answer 5

Question 6

What is the SOP (sum of products) of the following truth table:

Answer 6

Question 7

Give then following in formation, draw the circuit

Answer 7

Question 8

Build the circuit for the following truth table

Answer 8

Question 9

Given 3 inputs d₂d₁d₀ that represents a 3 bit value, we want to build a circuit to compute it’s 1’s compliment with outputs O₂O₁O₀

Answer 9

Question 10

How many inputs and output does an n-bit decoder have

Answer 10

n inputs

2ⁿ outputs

Question 11

What are decoders used for?

Answer 11

Converting memory/register address to a control (bus) line

Converting an opcode to one of n control lines

Question 12

Draw a circuit diagram of a 2-bit decoder

Answer 12

Question 13

Turn the following table into a decoder

Answer 13

Question 14

What is a multiplexeer and what are it’s general inputs

Answer 14

Question 15

Draw a 2-to-1 multiplexer using gates

Answer 15

Question 16

Draw the symbol of a 2-to-1 multiplexer with an enabler.

What is it know as when EN is 1 or 0?

Answer 16

Question 17

Answer 17

Question 18

What is a Half Adder

Draw the truth table that categorizes a half-adder

Answer 18