| 摘要 |
A crosspoint switch architecture ( 10 ). The inventive architecture ( 10 ) includes a monolithic substrate ( 11 ) on which a plurality (N) of electrical inputs are provided. In addition, a plurality (M) of electrical outputs are provided on the substrate ( 11 ). A switch is disposed on the substrate ( 11 ) for selectively interconnecting the inputs to the outputs and a control circuit ( 16 ) is disposed on the substrate ( 11 ) for controlling the switch. The switch comprises M, N to 1 , multiplexers ( 14 ), each multiplexer ( 14 ) being adapted to receive each of the N electrical inputs. In the illustrative embodiment, each of the N inputs to each of the multiplexers is received through a respective one of N switchable amplifiers ( 18 ). The output of each amplifier ( 18 ) is provided to a respective one of N switchable isolation buffers ( 19 ). The outputs of the buffers ( 19 ) are summed and buffered to provide the output of each multiplexer ( 14 ). The control circuit ( 16 ) selects which input is to be passed through to the output of a given multiplexer ( 14 ). In the illustrative embodiment, the control circuit ( 16 ) includes a serial in, parallel out shift register and decode logic circuitry.
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