Crossover switch

In electronics, a crossover switch or matrix switch is a switch connecting multiple inputs to multiple outputs using complex array matrices designed to switch inputs to outputs such that each output is connected to only one input, but usually inputs may be connected to multiple outputs. There are blocking and non-blocking types of cross-over switches. In a non blocking switch, the switch allows arbitrary interconnections and disconnections to each output at all times whereas a blocking switch new connections can be constrained by other connections.

These switches can be microelectromechanical systems, electrical, or nonlinear optical systems, and are used in electronics and fiber optic circuits, as well as some optical computers.[1] A banyan switch is one type of cross-over switch. Their complexity depends on the topology of the individual switches in a switch matrix (how wide it is by how many 'plies' or layers of switches it takes), to implement the desired crossover logic.

## Contents

* 1 Formula
* 2 Measurement
* 3 See also
* 4 References

## Formula

Typical crossover matrices follow the formula: an N×N Banyan switch uses (N/2) log N elements. Other formulas are used for differing number of cross-over layers, and scaling is possible, but becomes very large and complex with large N×N arrays. CAD and AI can be used to take the drudgery out of these designs.

## Measurement

The switches are measured by how many stages, and how many up/down sorters and crosspoints. Switches often have buffers built in to speed up switching speeds. A typical[clarification needed] switch may have a 2×2 and 4×4 down sorter, followed by an 8×8 up sorter, followed by a 2×2 crosspoint banyan switch network, resulting in a 3-level sorting for a 3-stage banyan network switch. The future is moving to larger arrays of inputs and outputs needed in a very small space.

## See also

* Clos switch
* Crossbar switch

## References

1. ↑ Picton, P. D. (1994-09-01). "Modified Fredkin gates in logic design" (in en). Microelectronics Journal 25 (6): 437–441. doi:10.1016/0026-2692(94)90068-X. ISSN 0026-2692. https://dx.doi.org/10.1016/0026-2692(94)90068-X.

* v
* t
* e

Switch types

* Analogue switch
* Banyan switch
* Battery isolator
* Cam switch
* Centrifugal switch
* Company switch
* Contact protection
* Crossbar switch
* Crossover switch
* Cryotron
* DIP switch
* Dry contact
* Electric switchboard
* Float switch
* Half-moon switch
* Humidistat
* Infinite switch
* Inertial switch
* Kill switch
* Key switch
* Knife switch
* Limit switch
* Latching switch
* Light switch
* Lightning switch
* Magnetic proximity fuze
* Magnetic starter
* Magnetic switch
* Mercury switch
* Miniature snap-action switch
* Motion-triggered contact insufficiency
* Optical switch
* Photoswitch
* Piezo switch
* Placebo button
* Pull switch
* Push switch
* Push-button
* Reed switch
* Rotary switch
* Sail switch
* Sea switch
* Silicone rubber keypad
* Softswitch
* Spark gap
* Staircase timer
* Stepping switch
* Thermostat
* Time switch
* Touch switch
* Transfer switch
* Vacuum switch
* Vandal-resistant switch
* Wireless light switch
* Zero speed switch

* v
* t
* e

Telecommunications

History|

* Beacon
* Broadcasting
* Cable protection system
* Cable TV
* Communications satellite
* Computer network
* Data compression
* audio
* DCT
* image
* video
* Digital media
* Internet video
* online video platform
* social media
* streaming
* Drums
* Edholm's law
* Electrical telegraph
* Fax
* Heliographs
* Hydraulic telegraph
* Information Age
* Information revolution
* Internet
* Mass media
* Mobile phone
* Smartphone
* Optical telecommunication
* Optical telegraphy
* Pager
* Photophone
* Prepaid mobile phone
* Radio
* Radiotelephone
* Satellite communications
* Semaphore
* Semiconductor
* device
* MOSFET
* transistor
* Smoke signals
* Telecommunications history
* Telautograph
* Telegraphy
* Teleprinter (teletype)
* Telephone
* The Telephone Cases
* Television
* digital
* streaming
* Undersea telegraph line
* Videotelephony
* Whistled language
* Wireless revolution

Pioneers|

* Nasir Ahmed
* Edwin Howard Armstrong
* Mohamed M. Atalla
* John Logie Baird
* Paul Baran
* John Bardeen
* Alexander Graham Bell
* Tim Berners-Lee
* Jagadish Chandra Bose
* Walter Houser Brattain
* Vint Cerf
* Claude Chappe
* Yogen Dalal
* Donald Davies
* Lee de Forest
* Philo Farnsworth
* Reginald Fessenden
* Elisha Gray
* Oliver Heaviside
* Erna Schneider Hoover
* Harold Hopkins
* Internet pioneers
* Bob Kahn
* Dawon Kahng
* Charles K. Kao
* Narinder Singh Kapany
* Hedy Lamarr
* Innocenzo Manzetti
* Guglielmo Marconi
* Robert Metcalfe
* Antonio Meucci
* Jun-ichi Nishizawa
* Radia Perlman
* Alexander Stepanovich Popov
* Johann Philipp Reis
* Claude Shannon
* Henry Sutton
* Nikola Tesla
* Camille Tissot
* Alfred Vail
* Charles Wheatstone
* Vladimir K. Zworykin

Transmission
media|

* Coaxial cable
* Fiber-optic communication
* optical fiber
* Free-space optical communication
* Molecular communication
* Radio waves
* wireless
* Transmission line
* data transmission circuit
* telecommunication circuit

Network topology
and switching|

* Bandwidth
* Links
* Nodes
* terminal
* Network switching (circuit
* packet)
* Telephone exchange

Multiplexing|

* Space-division
* Frequency-division
* Time-division
* Polarization-division
* Orbital angular-momentum
* Code-division

Networks|

* ARPANET
* BITNET
* Cellular network
* Computer
* CYCLADES
* Ethernet
* FidoNet
* Internet
* Internet2
* ISDN
* LAN
* Mobile
* NGN
* NPL network
* Public Switched Telephone
* Radio
* Telecommunications equipment
* Television
* Telex
* WAN
* Wireless network
* World Wide Web

* Category
* Outline
* Portal
* Commons

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Crossover switch. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Engineering:Crossover_switch&oldid=3903186"
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template