Digital Logic Toolkit

Digital Logic Toolkit — Logic gate symbols

Source
https://digitallogictoolkit.com/logic-gate-symbols/
Printed

AND — IEEE distinctive shape vs IEC rectangle — logic gate symbols

introthe two standards for one gate

Answer

output column 0001

Why this example is worth doing

The side-by-side that the whole page exists for. IEEE 91-1984 draws AND as a D-shape; IEC 60617-12 draws a plain rectangle with the qualifying symbol & inside. Neither is more correct, but they are regionally sorted — distinctive shapes dominate US and UK teaching, rectangles dominate continental Europe and much of Asia — and a student who submits the wrong set loses marks. This example is the argument for the site-wide toggle being a persistent preference rather than a per-page control.

Try your own input in the Logic gate symbols. Every gate in both symbol standards, side by side, on a printable one-page chart.

How the answer is reached

Truth table

Truth table — columns #, A, B, A · B
#ABA · B
0000
1010
2100
3111

Compare with

Open the Logic gate symbols

This input is entered in the tool itself — it is too rich for a link to carry.

Note:

Notation this page assumes

  • Symbols: · is AND, + is OR, ⊕ is XOR, a prime or an overline is NOT. The field also takes ∧ ∨ ¬ ~ ! & | and the words.
  • Operator precedence, tightest first: NOT, then AND (including juxtaposition), then XOR/XNOR, then NAND/NOR, then OR, then IMPLIES, then IFF.
  • Gate symbols follow whichever standard the header toggle is set to: ANSI/IEEE Std 91-1984 distinctive shapes, or IEC 60617-12 rectangles.

Sources

  • ANSI/IEEE Std 91-1984, Graphic Symbols for Logic Functions
  • IEC 60617-12, Graphical Symbols for Diagrams — Binary Logic Elements