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Modeling and Simulation of Fractional Frequency Synthesizer

Author: HuYue
Tutor: ZhouJianJun
School: Shanghai Jiaotong University
Course: Circuits and Systems
Keywords: Fractional Frequency Synthesizer sigma-delta modulator Linear modeling Behavioral models Dynamic Analysis
CLC: TN74
Type: Master's thesis
Year: 2008
Downloads: 163
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Abstract


For the modeling and simulation of fractional frequency synthesizer using delta-sigma modulation (Δ-ΣPLL) conducted in-depth discussions . The model is divided into two parts , linear models and behavioral models . This article first discussed the transfer function in the form of mixed-signal system . The basis of the continuous and discrete signal processing theory , be comprehensive , and derive a clear mixed-signal system transfer function expression , applicable to the practical application of phase-locked loop ( PLL ) , delay loop ( MDLL ) and other mixed-signal system . Subsequently on the the second CPPLL linear model is introduced , especially where Kam phase frequency detector (PFD) and frequency domain model focuses on the use of the related field simulation in mathematics what assumptions can get a PFD linear frequency domain model . Discussed in which the degree of approximation . The rest of the papers of the preparation of a set of PLL -aided design software for the dynamic analysis and behavior -level model discussed . Dynamic analysis of the use of the aforementioned mixed-signal system transfer function expression and linear modeling results , the system transfer function of a second-order Δ-Σ charge pump PLL . Its system parameter optimization method to determine the method of settling time and noise characteristics . Finally, with regard to the behavioral model , the use of Matlab to write a set of second-order Δ-Σ charge pump PLL behavioral model , the duty cycle level (Cycle-wise) behavior -level simulation . Be able to make a description of the non-linear behavior of the charge pump PLL , VCO , and the delta-sigma modulator to obtain accurate time domain stability analysis curve .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Frequency synthesizer technology,frequency synthesizer
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