| 摘要 |
Representative embodiments are directed to systems and methods that recover a clock from optical NRZ data. A first photodetector and a second photodetector are connected in series across complementary power supplies. The first photodetector is illuminated with the optical NRZ data. The second photodetector is illuminated with a delayed version of the optical NRZ data. A resistor may provide a path from a node between the photodetectors to ground. By utilizing the delayed version to illuminate the second photodetector, current is only conducted through the resistor when a data transition occurs. Furthermore, suitable rectifying structure may be employed to combine positive and negative pulses to form an output signal. The output signal possesses a spectral component at the frequency of the clock. I The output signal may be filtered to recover the clock associated with the received NRZ data.
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