EP 0430405 A2 19910605 - Digital switcher for routing signals.
Title (en)
Digital switcher for routing signals.
Title (de)
Numerischer Schalter zur Vermittlung von Signalen.
Title (fr)
Commutateur numérique pour acheminer des signaux.
Publication
Application
Priority
GB 8927207 A 19891201
Abstract (en)
A digital switcher routes signals at rates up to or more than 300 MHz between switcher inputs and outputs. The switcher includes an array of n rows and m columns of modules linking n groups of switcher inputs and m groups of switcher outputs. Each module consists of a primary switching unit (A1) for selectively coupling individual ones of its outputs to ones of its inputs and a number of individually-controllable, regenerative, two-input selector switches (A2). The primary and selector switches are controlled by a controller (20). The selector switch outputs form the module outputs. Each selector switch has an input connected to an associated output of the primary switching unit in the same module, and the other connected to an associated output of a module in the previous row of the array (apart from those in the first row). The switcher outputs are derived from the outputs of the last row of modules. To route a signal from a switcher input to a selected switcher output, the appropriate primary switching unit to which that switcher input is fed links its corresponding input to the selected one of its outputs. The regenerative selector switches in that module and in modules in subsequent rows then cascade the signal from that module through the subsequent rows to the selected switcher output. <IMAGE>
IPC 1-7
IPC 8 full level
H04H 20/78 (2008.01)
CPC (source: EP)
H04H 20/78 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0430405 A2 19910605; EP 0430405 A3 19920701; CA 2030895 A1 19910602; GB 8927207 D0 19900131
DOCDB simple family (application)
EP 90310062 A 19900913; CA 2030895 A 19901126; GB 8927207 A 19891201