Digital Intro

Question 1

What is the general structure of CMOS logic

Answer 1

A pull-up network in series with a pull-down network

Question 2

How are the PUN and PDN related?

Answer 2

They are complimented variables. PDN=nY PUN=Y

One can be found from the other by DeMorgan’s thereom or the duality property.

Question 3

What is the duality property in CMOS?

Answer 3

For combinational logic, Where a series branch exists in one, a parallel branch exists in the other.