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A 25 Gbit/s decision circuit, a 34 Gbit/s multiplexer, and a 40 Gbit/s demultiplexer IC have been realised with selective epitaxial silicon bipolar technology using 0.8 μm lithography. The data rates achieved are the highest values reported for these types of circuit in any IC technology.
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Felder et al. (1993) studied this question.
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