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In order to treat highly localized excitations in a solid a simple spherical model has been developed. The Coulomb potential from the nucleus at the site of the excitation is treated exactly, while the potentials from the surrounding sites are turned into pseudoion pontentials. Only the spherical average of these potentials is retained and separate self-consistent calculations for the ground state
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Deep-submicrometer CMOS processes are not suitable for traditional analog circuit design but they provide new opportunities of integrating complex digital functions. Within RF wireless communications, frequency synthesis stands out as a fundamental feature and novel digital solutions have been suggested for its implementation. Moving from an existing model, the goal of this paper is to outline the