InP HBT driver circuit optimization for high-speed ETDM transmission

The design of high-speed circuits and optimization of function of technological and geometrical parameters are presented. Various modeling aspects are discussed, such as model accuracy for InP heterojunction bipolar transistor and modeling with technological and geometrical parameters. MUX-driver design and optimization for 40-Gb/s ETDM transmission is presented. The impact of collector thickness (W/sub c/) on driver performances is evaluated and assessed by circuit fabrication and measurements. Results of 40-Gb/s electrical measurements and optical experiment with realized MUX-driver module are presented.