A 1.4 Gb/s 12-channel parallel laser diode driver IC for optical interconnections
The authors present a 12-channel parallel laser diode (LD) driver with 16.8 Gb/s throughput. The driver IC creates skew-free output and provides temperature compensation of the optical power of the LD. The IC also suppresses ringing oscillation and crosstalk. The die is 2.5x3.5 mm/sup 2/ using a 15 GHz f/sub /spl tau// Si bipolar process. The power supply voltage is 5 V and the power consumption is 4.2 W including the PECL level input signal consumption of 1.1 W and the output signal consumption of 2.0 W at 3l mApp + 2 mA bias.
A 500 Mb/s, 20-channel CMOS laser diode array driver for a parallel optical bus
For the ever-increasing demand of communication bandwidth for clustered computer interconnections, parallel optical bus technology provides a small, lightweight, flexible and low-cost alternative to the existing technology. A 20-channel, 500 Mb/s/channel CMOS laser diode (LD) driver drives a vertical cavity surface emitting laser (VCSEL) array in a parallel optical bus transmitter. It has a 500 Mb/s low voltage differential signal (LVDS) input interface with wide input common mode range. Total data throughput is 10 Gb/s. It uses a standard 3.3 V power supply with 1.6 W of power dissipation, with user features such as on-chip data scrambling and built-in link self-test.
Mean field model of a game for power
Abstract Our aim is to model a game for power (equivalent to total energy) as a dynamical process, where an excess of power possessed by a player allows him to gain even more power. Such a positive feedback is often termed as the Matthew effect. Analytical and numerical methods allow to identify a set of stationary states, i.e. fixed points of the model dynamics. The positions of the unstable fixed points give an insight on the basins of attraction of the stable fixed points. The results are interpreted in terms of modeling of coercive power.