H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/1
H04B 10/12 (2006.01)
Patent
CA 1143795
42-239(CANADA)/P2.32 FIBER OPTICS COMMUNICATION SYSTEM ABSTRACT A fiber optics transceiver transmits and receives either synchronous or asynchronous data through a fiber optics data communication cable. The transceiver is connected to one end of the cable and communicates with an identical transceiver at the other end of the cable. The transceiver includes a transmitter for converting electrcial digital data from a data source connected to the transmitter to optical flux for the cable. For asynchronous data, the flux comprises a train of positive-going pulses when the data is at a logical ONE, and a train of negative-going pulses when the data is at a logical ZERO. The train of pulses is interspaced at a fixed time interval and is restarted at each transition of the data between the logical ONE and logical ZERO state. For synchronous data, the flux comprises a train of positive-going pulses when the data is at a logical ONE, and a train of negative-going pulses when the data is at a logical ZERO. Each of the pulses in the train correspond to one transition of a clock waveform to which the data is synchronized. The transceiver also includes a receiver for converting optical flux from the cable to electrical digital data for data equipment connected to the receiver. For flux generated from asynchronous data, the receiver reconstructs the data. For flux generated from synchronous data, the receiver reconstructs both the data and the clock to which the data was synchronized. The transceiver also includes provisions for indicating the operationality of the data communications system formed by the two transceivers and the cable.
363297
Perkins Research & Manufacturing Company Inc.
Smart & Biggar
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