EE101Lecture8

EE101Lecture8 - Introduction to Digital Logic Lecture 8:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
© Mark Redekopp, All rights reserved Introduction to Digital Logic Lecture 8: Negative Logic Circuit Manipulations 2-Level Implementations
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
© Mark Redekopp, All rights reserved Negative Logic Recall it is up to us humans to assign meaning to the two voltage levels Thus, far we‟ve used (unknowingly) the positive logic convention where 1 means true and 0 means false In negative logic 0 means true and 1 means false volts time 1=true/on 0=false/off volts time 1=false/off 0=true/on Negative Logic Convention Positive Logic Convention (Value/Meaning) (Value/Meaning)
Background image of page 2
Negative Logic „AND‟ Function X Y Z 0 0 0 0 1 0 1 0 0 1 1 1 X Y Z 1 1 1 1 0 1 0 1 1 0 0 0 X Y Z 0 0 0 0 1 1 1 0 1 1 1 1 P.L. AND X Y Z P.L. P.L. P.L. AND X Y Z N.L. AND N.L. N.L. N.L. AND X Y Z N.L. N.L. Traditional AND gate functionality assumes positive logic convention Given negative logic signals, we can invert to positive logic, perform the AND operation, then convert back to negative logic However, we then see that
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 13

EE101Lecture8 - Introduction to Digital Logic Lecture 8:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online