Patent ID: 8204050

Claim:
A single-rotator circulating switch comprising: a single rotator having: N inlets indexed as inlets 0 to (N−1), N>2, each inlet connecting to a 2:1 receiving selector; and N outlets indexed as outlets 0 to (N−1), each outlet connecting to a 1:2 sending selector; wherein inlet j connects to outlet {j+t} modulo N during a time slot t of a time frame organized into N time slots, 0≦j<N; N switch elements indexed as switch elements 0 to (N−1), wherein switch element k, 0≦k<N, comprises: two internal output ports alternately connecting to inlet k of said single rotator through a respective 2:1 receiving selector during each time slot of said time frame; two internal input ports alternately connecting to outlet {L−k} modulo N , 0≦L<N, of said single rotator through a respective 1:2 sending selector during each time slot of said time frame; an external input port for receiving data from external data sources; and an external output port for transmitting data to external data sinks.