High speed 8:1 multiplexer and 1:8 demultiplexer implanted withAlGaAs/GaAs HBTs

摘要

Development of an 8:1 multiplexer and 1:8 demultiplexerimplemented with AlGaAs/GaAs heterojunction bipolar transistors isreported. The circuits were designed for lightwave communications andoperate at data rates above 6 Gbit/s. The intrinsic speed of thecircuits can be further increased by design changes with more powerallocated per gate and better time matching at the high-speed ends. Thecircuit design, fabrication, and test results are presented