Abstract

Design and performance of a high speed 27-1 pseudo random bit sequence (PRBS) generator chip is presented. The circuit operates at a speed up to 86 Gbit/s and is fabricated in an advanced SiGe technology with a cutoff frequency ft of 200 GHz and a maximum oscillation frequency fmax of 240 GHz. It is based on a multiplexed linear feedback shift register and has a power consumption of 950 mW. An 1:2 demultiplexer, made in the same technology for up to 86 Gbit/s is also presented. With this two circuits electrical data transmission up 86 Gbit/s is demonstrated.