Solid state crosspoint switch

摘要

A solid state crosspoint switch particularly suited for use in a telephone switching matrix includes two switching transistors. Audio signals are enabled to pass through the crosspoint switch via a low impedance path by driving the two switching transistors into saturation from a gated control circuit responsive to appropriate control signals. Noise immunity is provided by a current regulating switch interposed between the crosspoint switch and the control circuit. Another embodiment includes two switching transistors and two compensating transistors in a balanced bridge configuration to substantially eliminate crosstalk while the switch is open.