Journal article
Analytical model and behavioral simulation approach for a ΣΔ fractional-N synthesizer employing a sample-hold element
A previously unknown intrinsic nonlinearity of standard SigmaDelta fractional-N synthesizers is identified. A general analytical model for SigmaDelta fractional-N phased-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.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2003 |
| Pages: | 850-859 |
| ISSN: | 1558125x and 10577130 |
| Types: | Journal article |
| DOI: | 10.1109/TCSII.2003.819138 |
| ORCIDs: | Bruun, Erik |
Linear systems nonlinearities phase noise phase-locked loops sigma-delta modulation simulation
/spl Sigma//spl Delta/ fractional-N synthesizer Analytical models Discrete event simulation GSM GSM modulation synthesizer Object oriented modeling PLL Phase locked loops Phase noise Quantization Sampling methods Synthesizers Topology cellular radio circuit simulation frequency synthesizers object-oriented event-driven behavioral simulation phase locked loops phased-locked loops sample and hold circuits sample-hold element synthesizer intrinsic nonlinearity synthesizer topology
