logic gate


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

logic gate

[′läj·ik ‚gāt]
(computer science)

logic gate

An integrated circuit or other device whose inputs and outputs represent Boolean or binary values as voltages (TTL uses 0V for False or 0, +5V for True or 1). Different gates implement different Boolean functions: AND, OR, NAND, NOR (these may take two or more inputs) NOT (one input), XOR (two inputs). NOT, NAND and NOR are often constructed from single transistors and the other gates made from combinations of these basic ones. These functions are all combinatorial logic functions, i.e. their outputs depend only on their inputs and there is no internal state. Gates with state, such as latches and flip-flops, are constructed by feeding some of their outputs back to their inputs.

logic gate

A collection of transistors and resistors that implement Boolean logic operations in a circuit. Transistors make up logic gates. Logic gates make up circuits. Circuits make up electronic systems. The truth tables and symbols follow. See Boolean logic.














References in periodicals archive ?
As the logic gate topology varies between gates, it is difficult to obtain a closed-form expression for the probability of abnormal power occurrence.
Logic gates and other digital devices implemented using NMOSs are said to have NMOS logic.
The experiment demonstrated how to build larger quantum circuits in a more direct way, using photons, without using small logic gates.
In [8], the individual contribution to the total SER (soft error rate) for each logic gate has a limited value, gate sizing is performed as all logic gates satisfy this threshold.
"The entangled messenger pairs could be produced in a dedicated part of the computer and shipped separately to qubits that need to be connected with a logic gate but are in remote locations," Leibfried added.
One trigger of the logic gate is the TME, and the other is the target antigen (AXL or ROR2, depending on the product).
The power and area estimate of the DFF is the sum of the contained logic gate estimates.
These assemblies also have the ability to attain cascade amplification and logic gate operation upon including catalytic [23-25] and logical control elements [26-28] and circuits [29-32].
In this experiment, multiphotonic phenomena have been contemplated for applications in exclusive-or logic gates to selected optical signals.
In fact, the SOAs' devices have technologically matured to the point that they have become the primary choice for the implementation of all-optical logic gates. SOA is the most attractive optoelectronics device due to its compact size, low power requirement, temperature stability, and ease to connect with other optoelectronics devices.
In this design, all optical NAND logic gate based on ring resonator of nonlinear photonic crystal is implemented.
LECTOR technique introduces two leakage control transistors (PMOS and NMOS) in between the PUN and the PDN of the logic gate with the gate terminal of each of the leakage control transistors (LCTs) controlled by the source of the other.