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A 2 times 21.5-22.3 Gb/s to 4 times 10.7-11.2 Gb/s SF15.2 compliant two-chip SerDes for a 40 Gb/s optical transponder module has been fabricated in 65 nm 12-metal CMOS. The deserializer receives 2 times 20 Gb/s data from a TIA and outputs SF15.2 4 times 10 Gb/s data and 10 Gb/s deskew channel. The serializer receives SF15.2 inputs and outputs 2 times 20 Gb/s for the optical DQPSK modulator. Although...
The first 50-GHz to 110-GHz downconverter in 45-nm digital CMOS is presented along with the mm-wave characterization of AMOS varactors, inductors and transformers. The varactor Q is higher than 6, up to 94 GHz. The downconverter gain is 15 dB at 111GHz, and is employed as a broadband test vehicle to characterize the optimal noise figure current density (JOPT) of 45-nm MOSFETs in the 50 GHz to 110...
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