Saturday, September 19, 2009 3:49 PM,

A student writes (about problem 6a):



	My group mates and I have been discussing the S1 and S0 inputs to 
	the 2:1 MUXes, and have reached a standstill in our argument. 
	The question hanging over our solving of the problem is as 
	follows: is it possible for a select input to be branched to 
	two separate MUXes?

	<<name withheld to protect the student who wants to know how many times>



Answer: Absolutely.  In fact, a logical variable can be used as input to as 
many logic gates as the electronics will allow.  In the real world, we 
normally design these circuits so one logical variable can be input to up to 
four subsequent inputs.  We call it "a fan-out of four."

No matter.  For 306 purposes (unless we specifically say otherwise), you can 
use a logical variable as input to as many gates as you wish.

Good luck with  the rest of the course.

Yale Patt