power consumption in full adder circuit

Status
Not open for further replies.

ssubha

Junior Member level 2
Joined
Feb 1, 2011
Messages
21
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,435
For the full adder circuit realized with one 3-input XOR gate for sum, three 2-input AND gate and one 3-input OR gate the power consumed for these gates is x mW. The full adder circuit designed from two 2:1 multiplexers, one XOR/XNOR, one AND/OR gate based on the value of c input is ymW. I find that y>x. I request you to let me know if this is because the full adder circuit in traditional way has multiple instances of same logic gate consuming less power.
 

You can easily draw the circuit and see how many nets toggle..... Power = C*V*V....so you have to calculate the amount of cap that is charged during an input to output path....
 

Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…