Active Optical Clock Distribution
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چکیده
One solution to the clock uncertainty problem is to distribute the clock optically. Conventionally, this has involved using a transimpedance pre-amplifier to convert the optical current pulses from the photodetector into voltage waveforms. An inverter-based cascade is then used to amplify the clock pulses into full-swing signals that drive the local clock buffers. Past research has shown that this approach is limited by the imperfect matching of amplifiers from one block to another. Arising from process, voltage, and temperature, these variations can significantly increase the skew, thus negating the benefits of distributing a skewless optical clock.
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تاریخ انتشار 2002