Definition

1. Noun:
   • A logic gate in computing: An "and gate" is a fundamental digital logic gate that implements logical conjunction. It outputs a high signal (often representing '1' or 'true') only when all of its input signals are high. If any input is low (representing '0' or 'false'), the output will be low.

Usage

• The term "and gate" is used specifically in the context of digital electronics, computer engineering, and Boolean algebra to describe a basic building block of digital circuits.
• It is a compound noun, typically written as two separate words ("and gate") or sometimes hyphenated ("AND-gate"). The logical operation "AND" is often capitalized when referring to the gate's function.

Examples

• Noun:
  • The processor's design requires an and gate to combine these two control signals.
  • For the alarm to sound, both sensors must be triggered; this is implemented using an and gate.
  • The truth table for an and gate shows an output of 1 only when input A and input B are 1.

Advanced Usage

• In Boolean Expressions: In logic diagrams and equations, an "and gate" performs the Boolean AND operation, represented by a dot (·) or the absence of an operator (e.g., A · B or simply AB).
• Physical Implementation: An "and gate" can be constructed from transistors (e.g., in CMOS technology) and is a core component of more complex circuits like adders and memory units.

Variants and Related Words

• AND (conjunction/operation): The logical operation performed by the gate.
• Logic gate (n): The general category of digital circuits, including OR gates, NOT gates, NAND gates, etc.
• NAND gate (n): A universal logic gate that is an "and gate" followed by a "not gate"; it outputs the inverse of an "and gate".

Synonyms

• Conjunction gate: A less common but technically accurate synonym, stemming from the logical operation "conjunction".
• Logical AND circuit: A descriptive synonym.

Related Concepts (Not Phrasal Verbs or Idioms)

• Truth Table: A table describing the output of a logic gate for all possible input combinations.
• Integrated Circuit (IC): Chips that contain millions of logic gates, including "and gates".

Noun

1. a circuit in a computer that fires only when all of its inputs fire