A 150 MW 8 1-MUX AND A 170 MW 1/8-DEMUX FOR 2.4 GB/S OPTICAL-FIBER COMMUNICATION-SYSTEMS USING N-ALGAAS/I-INGAAS HJFETS/

An 8:1 multiplexer (MUX) and a 1:8 demultiplexer (DEMUX) for 2.4-Gb/s optical communication systems have been developed using 0.35-mu m GaAs heterojunction field-effect transistors (FET's), To ensure timing mar gins, a new timing generator with latches and new clock buffers with c ross-coupled inverters have been developed, These large-scale integrat ions (LSI's) operate at over 2.4 Gb/s with a power consumption of 150 mW (MUX) and 170 mW (DEMUX) at a supply voltage of 0.7 V, and at over 5 Gb/s with power consumption of 200 mW at a supply voltage of 0.8 V.