| 摘要 |
PURPOSE: To obtain a photoelectric cross bas switch in which a high switching speed can be applied, and allowable channel separation can be attained. CONSTITUTION: This is a photoelectric cross bar switch for selectively connecting signals transmitted by first and second light beams with one output node, and this circuit is provided with a first photodetector 30 optically aligned with the first input light beam, and a second photodetector 32 optically aligned with the second input light beam. Also, this circuit is provided with selectively energizable photodetectors 30-36 which convert the signals transmitted by the first and second beams into electric output signals, and supply the output signals to an output node 42, multiplexer means 26 which energizes the first and second photodetectors according to a control signal, and laser diode 44 which illuminates the first and second photodetectors according to the control signal. |
