Analytical Model and Behavioral Simulation Approach for a Fractional-N Synthesizer Employing a Sample-Hold Element
نویسندگان
چکیده
A previously unknown intrinsic nonlinearity of standard fractionalsynthesizers is identified. A general analytical model for fractionalphased-locked loops (PLLs) that includes the effect of the nonlinearity is derived and an improvement to the synthesizer topology is discussed. Also, a new methodology for behavioral simulation is presented: the proposed methodology is based on an object-oriented event-driven approach and offers the possibility to perform very fast and accurate simulations, and the theoretical models developed validate the simulation results. We show a GSM example to demonstrate the applicability of the simulation methodology to real study cases.
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