A Gigabit-Rate Five-Highway GaAs OE-LSI Chipset for High-Speed Optical Interconnections Between Modules or VLSI 's

A gigabit-rate five highway interface GaAs OE-LSI chipset has been fabricated for the 0.85 µm wavelength range optical interconnections between modules or VLSI 's. The optical sender consists of a high-speed laser driver array LSI having 2 Gb/s maximum operation speed and a tiny laser array. The optical receiver in a GaAs high-speed optical receiver array LSI with a monolithically integrated MSM photodetector, a high-speed preamplifier, and a decision circuit that has a maximum operation speed of 1.8 Gb/s. The receiver LSI is provided with a new bit-synchronizing circuit and an automatic threshold determination circuit. This LSI chipset can be applicable for future broadband-ISDN communication equipment and high-speed super computers.