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We propose a Faraday anomalous dispersion optical filter (FADOF) based on a rare-earth ion doped crystal. We present theoretical analyses for the solid-state FADOF transmission. Our theoretical model predicts a maximum transmission efficiency of 71% and a double-peaked transmission spectrum with a bandwidth of 6 GHz under current experimental conditions. Our proposal may have important applications in optical communications. [ABSTRACT FROM AUTHOR]

Bus-invert (B!) coding is the first encoding method for reducing peak and average self-switching power on a bus. It can also reduce capacitive coupling between bus lines. Although it is no longer used as a stand-alone method, it is often used as a starting point for developing a more sophisticated method. Despite its wide use, researchers in the past often resorted to simulations or depended on their intuition to obtain the switching and coupling characteristics. We clearly need a simple but accurate way to carry out this task. We previously published results on BI coding analysis for switching activity reduction. In this paper we conduct a theoretical analysis of B! coding for coupling reduction for uncorrelated uniformly distributed data. Our findings include a set of closed-form formulas for computing the number of couplings per bus transfer for a nonpartitioned versus a partitioned bus. These formulas are simple and easily understandable. They can be readily used for calculating couplings by simply plugging one or two parameter values into them. [ABSTRACT FROM AUTHOR]