Modeling and behavioral simulation of noise transfer characteristics of a 2 GHz phased - locked loop for frequency synthesizer
نویسندگان
چکیده
We present here an analytical phase noise model of phased-locked loop for frequency synthesizer and its simulation in GHz frequency range. The noise model has been derived and simulated considering two different filter sections in the loop of the phased-locked loop model, namely: (i) active lag-lead filter and (ii) standard feedback approach. The noise transfer functions of the phased-locked loop frequency synthesizer are derived in s-domain for analysis. The mathematical model and analysis for the five main noise transfer functions which are existed in the system have been derived for analysis. The simulation of the phase noise is performed by using MATLAB (Version: 7.1). Here we will discuss in details the procedure for mathematical derivation of the noise model for both active leg-lead filter and filter with standard feedback approach in the loop, its simulation and their results.
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