"Sequentional" redirects here. For enumerated sequences, see sequential. For the conditional assertion, see sequent. For the corresponding type of formal logical argumentation, see sequent calculus.
Parts of this article (those related to computer science) need to be updated. The reason given is: Some information are outdated and referred to the past years. Please help update this article to reflect recent events or newly available information.(March 2024)
For additional information, see Asynchronous system.
Asynchronous circuit (clockless or self-timed circuit)[1]: Lecture 12 [note 1][2]: 157–186 is a sequential digital logic circuit that does not use a global clock circuit or signal generator to synchronize its components.[1][3]: 3–5 Instead, the components are driven by a handshaking circuit which indicates a completion of a set of instructions. Handshaking works by simple data transfer protocols.[3]: 115 Many synchronous circuits were developed in early 1950s as part of bigger asynchronous systems (e.g. ORDVAC). Asynchronous circuits and theory surrounding is a part of several steps in integrated circuit design, a field of digital electronics engineering.
Asynchronous circuits are contrasted with synchronous circuits, in which changes to the signal values in the circuit are triggered by repetitive pulses called a clock signal. Most digital devices today use synchronous circuits. However asynchronous circuits have a potential to be much faster, have a lower level of power consumption, electromagnetic interference, and better modularity in large systems. Asynchronous circuits are an active area of research in digital logic design.[4][5]
It was not until the 1990s when viability of the asynchronous circuits was shown by real-life commercial products.[3]: 4
^ abHorowitz, Mark (2007). "Advanced VLSI Circuit Design Lecture". Stanford University, Computer Systems Laboratory. Archived from the original on 2016-04-21.
^Staunstrup, Jørgen (1994). A Formal Approach to Hardware Design. Boston, Massachusetts, USA: Springer USA. ISBN 978-1-4615-2764-0. OCLC 852790160.
^ abcSparsø, Jens (April 2006). "Asynchronous Circuit Design A Tutorial" (PDF). Technical University of Denmark.
^Nowick, S. M.; Singh, M. (May–June 2015). "Asynchronous Design — Part 1: Overview and Recent Advances" (PDF). IEEE Design and Test. 32 (3): 5–18. doi:10.1109/MDAT.2015.2413759. S2CID 14644656. Archived from the original (PDF) on 2018-12-21. Retrieved 2019-08-27.
^Nowick, S. M.; Singh, M. (May–June 2015). "Asynchronous Design — Part 2: Systems and Methodologies" (PDF). IEEE Design and Test. 32 (3): 19–28. doi:10.1109/MDAT.2015.2413757. S2CID 16732793. Archived from the original (PDF) on 2018-12-21. Retrieved 2019-08-27.
Cite error: There are <ref group=note> tags on this page, but the references will not show without a {{reflist|group=note}} template (see the help page).
and 21 Related for: Asynchronous circuit information
Asynchronouscircuit (clockless or self-timed circuit): Lecture 12 : 157–186 is a sequential digital logic circuit that does not use a global clock circuit...
Digital sequential logic circuits are divided into synchronous and asynchronous types. In synchronous sequential circuits, the state of the device changes...
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor that produces torque is obtained by electromagnetic...
A delay-insensitive circuit is a type of asynchronouscircuit which performs a digital logic operation often within a computing processor chip. Instead...
(ATM). In this case, the asynchronously transferred blocks are called data packets, for example ATM cells. The opposite is circuit switched communication...
Symposium (International Symposium on AsynchronousCircuits and Systems), founded in 1994. A variety of asynchronous papers have also been published since...
circuit may be arrived upon, and the logic combinational circuit becomes smaller, and easier to analyse, use, or build. Sequential logic Asynchronous...
Globally asynchronous locally synchronous (GALS), in electronics, is an architecture for designing electronic circuits that addresses the problem of safe...
events Async/await Asynchronous system, a system having no global clock, instead operating under distributed control Asynchronouscircuit, a sequential digital...
provides functionality that uses features of circuit switching and packet switching networks by using asynchronous time-division multiplexing. ATM was seen...
engineering and computer engineering to describe dynamic behaviour of asynchronouscircuits, for the purposes of their analysis or synthesis. Informally, an...
Unlike classical circuit evaluation models, the repetition for a set of guarded commands (corresponding to an asynchronouscircuit) can accurately describe...
data transfer Asynchronouscircuit, or self-timed circuit, a sequential digital logic circuit that is not governed by a clock circuit or global clock...
approaches zero, the power consumption of that circuit approaches that of an asynchronouscircuit: the circuit only generates logic transitions when it is...
synchronous logic circuits. This interface is inherently asynchronous and must be analyzed as such. Examples of widely used asynchronouscircuits include synchronizer...
electronics, an arbiter helps order signals in asynchronouscircuits. There are also electronic digital circuits called synchronizers that attempt to perform...
and superior pull-in range. A phase frequency detector (PFD) is an asynchronouscircuit originally made of four flip-flops (i.e., the phase-frequency detectors...
Proceedings, Fifth International Symposium on Advanced Research in AsynchronousCircuits and Systems. University of Manchester Computer Science Department...
servers. In 1990, he moved to Manchester to lead research into asynchronouscircuits, low-power electronics and neural engineering, where the Spiking...
completion is a property of some classes of asynchronouscircuit. It means that the output of a circuit may be available as soon as sufficient inputs...
Global Information