From c82fc36fe4d8b60283b2f4435586b229e8f6024e Mon Sep 17 00:00:00 2001 From: thomasabishop Date: Tue, 27 Dec 2022 10:00:06 +0000 Subject: [PATCH] Autosave: 2022-12-27 10:00:06 --- Electronics_and_Hardware/Digital_circuits/Logic_gates.md | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Electronics_and_Hardware/Digital_circuits/Logic_gates.md b/Electronics_and_Hardware/Digital_circuits/Logic_gates.md index 99dae60..0a2382a 100644 --- a/Electronics_and_Hardware/Digital_circuits/Logic_gates.md +++ b/Electronics_and_Hardware/Digital_circuits/Logic_gates.md @@ -14,7 +14,7 @@ tags: [logic-gates, binary] Logic gates are the basic building blocks of digital computing. **A logic gate is an electrical circuit that has one or more than one input and only one output.** The input controls the output and the logic determining which types of input (on/off) lead to specific outputs (on/off) is isomorphic with the truth-conditions of the [Boolean connectives](/Logic/Truth-functional_connectives.md) specifiable in terms of [truth tables](/Logic/Truth-tables.md). -Physically, what 'travels through' the gates is electrical current and what constitutes the 'gate' is a [transistor](/Electronics_and_Hardware/Digital_circuits/Transistors.md) responding to the current. Going up a level of abstraction, the current/ charge is identified with a bit. It is bits that go into the gate and bits which come out: binary information that may be either 1 or 0. +Physically, what 'travels through' the gates is electrical current and what constitutes the 'gate' is a [transistor](/Electronics_and_Hardware/Digital_circuits/Transistors.md) responding to the current. Going up a level of abstraction, the current/ charge is identified with a [bit](/Electronics_and_Hardware/Binary/Binary_units_of_measurement.md#binary-units-of-measurement). It is bits that go into the gate and bits which come out: binary information that may be either 1 or 0. ## NOT gate @@ -33,6 +33,8 @@ Physically, what 'travels through' the gates is electrical current and what cons ### Interactive circuit + + ## AND gate > The AND gate represents the truth conditions of the [conjunction](/Logic/Truth-functional_connectives.md#conjunction) truth functional connective @@ -52,6 +54,8 @@ Physically, what 'travels through' the gates is electrical current and what cons ### Interactive circuit + + ## NAND gate > The NAND gate inverts the truth conditions of AND. @@ -71,6 +75,8 @@ Physically, what 'travels through' the gates is electrical current and what cons ### Interactive circuit + + NAND is a **universal logic gate**: equipped with just a NAND we can represent every other possible logical condition. In practice with circuits, it is more efficient to use specific dedicated gates (i.e OR, AND, NOT etc) for the other Boolean connectives but in principle the same output can be achieved through NANDs alone. ## OR gate