A. V. Len'shin, M. P. Savchenko, M. V. Maturazov, N. M. Tikhmirov, O. N. Tukalenko
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Influence of Charge Pump Pumping Nonlinearities and a Fractional Frequency Divider with a Delta-Sigma Modulator on the Noise Interference Spectrum in the PLL System
A mathematical model of a PLL with fractional frequency dividers using delta-sigma modulation and a frequency-phase detector with nonidentical values of charge-pump currents is obtained. On the basis of the obtained model, a program has been developed for calculating the level of interference of fragmentation.
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