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A 128-GS/s 63-GHz-bandwidth 2:1 analog-multiplexer (AMUX) module has been developed for ultrabroadband digital-to-analog (D/A) conversion subsystems. The AMUX IC was fabricated using 0.5-μm-emitter InP HBTs, which have a peak ft and fmax of 290 and 320 GHz, respectively. The IC has a through bandwidth of 67 GHz. We developed an ultra-low-loss metal package equipped with G3PO (SMPS) connectors. The...
An ultra-broadband 2∶1 analog-multiplexer (A-MUX) module has been developed for optical communications systems with a high symbol rate. The A-MUX IC was designed and fabricated using in-house InP HBTs, which have a peak ft and fmax of 290 and 320 GHz, respectively. The A-MUX module has a through bandwidth of over 50 GHz and operates at a clock rate of up to 50 GHz, leading to 100-GS/s operation. Its...
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