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An ultra-broadband 6 bit digital-to-analogue converter (DAC) has been designed and fabricated in InP-HBT technology. The DAC IC includes six 2:1 MUXs and thus operates with a half-rate clock. The DAC module is equipped with 1 mm connectors for its analogue output to ensure broadband characteristics. The measured analogue output bandwidth (BW) is >40 GHz. Four-level pulse amplitude modulation signals...
A new architecture using a half-rate clock for pseudo-random-bit-sequence (PRBS) generator has been devised for high-speed and low-power operation. For proof of concept, a 27−1 PRBS generator IC was designed and fabricated with 290-GHz-fT InP HBT technology. The PRBS generator operates up to 100 Gbps with a low power consumption of 955 mW, leading to a record figure-of-merit of 1.42 mW·Gbps−1. This...
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