Digital Logic Toolkit

Digital Logic Toolkit — Buffer

Source
https://digitallogictoolkit.com/buffer-gate/
Printed

A = 1 — buffer gate

introoutput equals input

Answer

output 1

Why this example is worth doing

The identity function, which is the least interesting truth table on the site and the reason the page has to justify itself immediately. A buffer changes nothing logically; everything it is for is electrical. Opening on the trivial row and saying so directly is more honest than dressing it up, and the rest of the page is about the reasons a logically redundant component is a standard part.

Try your own input in the Buffer. Truth table, symbol and algebraic form for the non-inverting buffer, and what it is for.

How the answer is reached

The probed row

A = 11— Row 1 of 2.

Truth table

Truth table — columns #, A, A
#AA
000
111

Compare with

Open this example in the Buffer

The field arrives filled in with this example’s input.

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