40 Gbit/s fully monolithic clock recovery IC using InAlAs/InGaAs/InP HEMTs

The authors describe a 40 Gbit/s fully monolithic clock recovery integrated circuit (IC) fabricated using 0.1 /spl mu/m InAlAs/InGaAs/InP HEMTs. The IC utilises injection locking, and consists of a half bit delay, an exclusive OR gate and a T-type flip-flop. The IC extracts a half-rate clock signal from a 39.81312 Gbit/s 2/sup 31/-1 pseudo-random bit sequence signal without any other external components.