Gate - Revision history

Jnc: typo

2021-05-14T11:06:11Z

typo

Jnc: +cat

2018-12-14T20:15:35Z

+cat

Jnc: An OK start

2018-03-23T01:57:34Z

An OK start

New page

A '''gate''' is the lowest level logical (as opposed to [[analog]]) circuit element. It takes a limited number of inputs, performs some operation on them, and produces an output (sometimes, the output and its negation).

Typical gates are:

* NOT (also known as an 'inverter')
* AND
* OR
* NAND (AND with inverted output)
* NOT (similar)

The first gates were built out of [[vacuum tube]]s; these were replaced with discrete [[transistor]]s. Larger logical elements, starting with [[flip-flop]]s, but including such things as [[counter]]s, [[shift register]]s, [[multiplexer]]s, etc, were built out of gates.

The next step was the creation of [[integrated circuit]]s; the first ones each held a number of gates, but quickly the larger elements were then built as ICs too.

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	The next step was the creation of [[integrated circuit]]s; the first ones each held a number of gates, but quickly the larger elements were then built as ICs too.		The next step was the creation of [[integrated circuit]]s; the first ones each held a number of gates, but quickly the larger elements were then built as ICs too.
		+
		+	[[Category: Basics]]

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 * OR
 * NAND (AND with inverted output)
-* NOT (similar)
+* NOR (similar)
 The first gates were built out of [[vacuum tube]]s; these were replaced with discrete [[transistor]]s. Larger logical elements, starting with [[flip-flop]]s, but including such things as [[counter]]s, [[shift register]]s, [[multiplexer]]s, etc, were built out of gates.