quartz/content/notes/combinatorial-logic.md

title	aliases	tags
combinatorial-logic		cosc204

[!Definition] Combinatorial Logic Circuit is a circuit whose digital outputs are dependent only on its digital inputs They can be described using logic expressions and therefore logic gates. We assume the outputs respond immediately

• current flows from + to -
• input to a unit (e.g., LED) is at the + end

They can be defined:

• Using a truth table
• Using boolean-equations (Q\ =\ A+\ B)
• Using graphical symbols

Adders

Parity Generator

Adds an extra bit to the input data so that the number of ones in the output is always odd. Used for error checking

Demux

7 Segment