Generation of high-speed pseudorandom sequences using multiplex-techniques

We report on the design and performance of high-speed pseudorandom sequence generators for nonreturn-to-zero (NRZ)-signals. The hardware is based on multiplexer circuits that multiply the data rate of a 5 Gb/s pseudorandom sequence to, respectively, 10 and 20 Gb/s. We employ multiplex-techniques based on the "cycle-and-add property" of pseudorandom sequences. The circuitry incorporates special high-speed silicon chips and is fabricated in both microstrip and coplanar waveguide technology. The experimental results demonstrate the feasibility of our approach.