Digital SiGe-chips for data transmission up to 85 Gbit/s

Design and performance of a 2:1 multiplexer and 1:2 demultiplexer IC up to 85.4 Gbit/s are presented. The chips are fabricated in an advanced SiGe technology with a cutoff frequency f/sub t/ of 200 GHz and a maximum oscillation frequency f/sub max/ of 275 GHz. With these two chips electrical data transmission at 80 and 85.4 Gbit/s could be achieved. In addition a pseudo random bit sequence (PRBS) generator IC is shown operating up to 80 Gbit/s and generating a 2/sup 31/-1 or a 2/sup 7/-1 pattern.