| 摘要 |
In a transceiver which is configured in particular for transmitting optical data, there is provided a device for reconstructing data from a received data signal (RX), having a clock-signal recovery unit ( 3 ) for recovering a clock signal belonging to the transmitted data from the received data signal, and having a data reconstruction unit ( 2 ) for reconstructing the transmitted data from the received data signal using the recovered clock signal (f<SUB>CLK</SUB>), and for emitting a data stream (DATA) which is synchronised with the recovered clock signal. A detector unit ( 9 ) detects an error state in the received data signal (RX) which prevents the data from being reconstructed reliably, switching means having a digital phase-locked lock ( 13 ) being provided to enable a signal having a clock rate which corresponds to the mean value of the clock signal (f<SUB>CLK</SUB>) previously recovered by the clock-signal recovery unit ( 3 ) to be fed, as a reference signal, to a phase-locked loop of the clock-signal recovery unit ( 3 ) in this event in place of the received data signal, thus ensuring that the phase-locked loop of the clock-signal recovery unit ( 3 ) will continue to oscillate properly even in this event.
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