Circuit Design Basics

197

01:47:38

I learned today that you can get a variety of digital circuits out of a chip by running the 5v VCC through a variety of steps in order to achieve a desired output.

XOR, NOR, and NAND gates, apparently, are inexpensive, and often make good trade-offs when it would be too expensive to add an extra NOT gate.

Digital outputs demonstrating the following boolean functions.


Double NAND = NOT
ab = ((ab)')'

NOR = NAND
a' + b' = (ab)'

XOR 
(a'+b) = (aa)' + b

XNOR
ab = (ab)'(ab)'

XNOR 2
Boolean expression results in 1 

(just plug in a and b to ground)
same truth for an XNOR gate)

published 10 years ago

darrhunt

10 years ago

Now I understand.

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