- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Analysis, Design, Simulation and Evaluation of Sigma-Delta (Σδ)Modulator for Gsm Synthesizer | ||
| Journal of Al-Nahrain University - Science | ||
| Article 1, Volume 14, Issue 1, 2011, Pages 68-83 | ||
| Authors | ||
| Haider R. Karim; Hadi T. Ziboon | ||
| Abstract | ||
| The analysis, design, simulation and evaluation of 2nd, 3rd and 4th order ΣΔ modulator and loopfilter respectively are discussed, in this paper, to show their impact on the performance offractional-N PLL-FS for GSM system. All simulation results show that the system is stable. Theresulting settling time, spurious level and phase noise at 20 MHz offset frequency of thissynthesizer for 2nd, 3rd and 4th order ΣΔ modulator and loop filter respectively are 2.92 μs, -35 dBc,-164 dBc/Hz, 3.28 μs, -64 dBc, -186 dBc/Hz, 3.38 μs, -79 dBc and -190 dBc/Hz for 2nd, 3rd and 4thorder respectively. These results show the improvement in the spurious level and phase noise by-19 dBc, -31 dBc/Hz for 3rd order system and -34 dBc, -35 dBc/Hz for 4th order system respectivelycompared to the published work. CppSim program and Matlab (R2007a) are used for the simulationof ΣΔ fractional-N PLL-FS. | ||
| Keywords | ||
| GSM; PLL; Loop filter; Sigma; Delta; Frequency Synthesizer | ||
|
Statistics Article View: 38 PDF Download: 7 |
||