Basic logic gates NOT, AND, OR can be used to design complex logic circuits.
However, the basic rule is to combine one or two inputs to output one.

When many inputs are combined in NOT, AND, and OR combinations we can make a digital circuit that operates one logic operation in every clock cycle.



In above circuit A OR B done in the first cycle to output D.

• C with its value waits at AND gate
• The output D from the previous operation becomes an input to AND gate

Z output generated on 2nd cycle by C AND D

Analyze and write Truth table for this logic circuit

a and b can

• How many clock cycles needed to complete the gate?
• what output will be at where in each cycle?
  
  

Write Truth Table
a  b   c
0  0   ?
0  1   ?
1  0   ?
1  1   ?

• Looking at inputs and outputs what can you say about this circuit?
• For what purpose this can be used?