CMOS LED-driver and PIN-receiver for fiber optical communication at 155 Mbit/s

A test chip for an integrated full cmos led driver has been realized with a modulation current of 60 mA at a maximum bit rate of 155 Mbit/s. A cmos receiver is evaluated to amplify pin diode photo currents less than 10 μA at the same bit rate of 155 Mbit/s. Both circuits are integrated on one chip. The circuit has been developed in a 0.8 μm digital cmos process.     

Space-domain Green's function approach to the capacitancecalculation of multiconductor lines in multilayered dielectrics withimproved surface charge modeling

An integral equation method for the calculation of capacitance and inductance matrices is presented. The method is suitable for multiconductor transmission lines embedded in a multilayered dielectric medium on top of a ground plane. Conductors of arbitrary polygonal cross section can be handled, as well as infinitely thin conductors. The method is new in two respects. The kernel of the integral equation is the space-domain Green's function of the layered medium. The accuracy of the solution is enhanced by using basis functions that exactly model the singular behavior of the charge density in the neighborhood of a conductor edge. Numerical examples show the accuracy of the calculations and the complexity of the configurations that can be treated