1.2 GBit/s Pseudo Random Pulse Generator Using Multiplexing with GaAs Mesfet Gates

A l.2 Gbit/s RZ pseudo random bit generator using multiplexing of six 200 Mbit/s channels, and a GaAs-MESFET gate circuit which exhibits both high speed and simplicity are presented. As a new contribution to the treatment of pseudo random sequences it is shown how the autocorrelation function and the Fourier spectrum of a sequence obtained by multiplexing are distorted. These functions may be shaped to a desired form by proper choice of mutual delays of sequences contributing to the multiplexing.