| 摘要 |
PURPOSE:To increase the number of transmittable and receivable signals without increasing the number of channels of series/parallel conversion by comparing an address in a received signal and a fixed address inputted to an address terminal, and outputting the data of m bits only when both addresses are coincident with each other. CONSTITUTION:Optical multiplexing signals transmitted through an optical fiber 5 come into a receiver continuously such as A1, D1, A2, D2, A3, D3, A4, D4.... The same signals A1, D1 are inputted to receivers A, B, C. An address A1 is compared with fixed addresses La, Lb, Lc of the receivers. Out of these addresses only one is equal to the address A1. An address terminal 4 is connected to La, Lb, Lc, and the data of m bits are outputted to the outside from a data terminal 3 only when this and address A1 coincide. For instance, supposing that A1=Lc, the data of m bits are outputted from the data terminal of the receiving circuit C. The data are not outputted from other receiving circuits A, B, and cleared. In this way, three kinds of addresses and accompanying three kinds of signal data can be received. |
