What fraction of the cost was saved in your circuit from 4.4.3 by implementing these two control signals together instead of separately?

Problem 44.3

When multiple logic expressions are implemented, it is possible to reduce implementation cost by using the same signals in more than one expression. Repeat 4.4.1, but implement both Control signal 1 and Control signal 2, and try to “share” circuitry between expressions whenever possible.

For the remaining three problems in this exercise, we assume that the following basic digital logic elements are available, and that their latency and cost are as follows:

Transcribed Image Text:

a. b. NOT Latency Cost 10ps 20ps 2 2 2-Input AND Latency Cost 12ps 40ps 4 3 2-Input OR Latency Cost 20ps 50ps 5 3 2-Input XOR Latency 30ps 50ps Cost 10 8