题目/Title：System Design Considerations of Highly-Integrated ΣΔ Fractional-N Frequency Synthesizer

作者/Author：
                        Shuilong Huang,Zhihua Wang

期刊/Journal：Journal of Circuits Systems and Computers

年份/Issue Date：2008Apr.

卷（期）及页码/Volume（No.）&pages：Vol.17, No.2, pp. 169 - 181

摘要/Abstract：
Modern wireless communication poses the requirements of fast settling time, small channel width, and low phase noise to frequency synthesizer. ΣΔ fractional-N frequency synthesizer is widely adopted due to its excellent characteristics in these aspects. This paper presents a number of system issues and design considerations/tradeoffs which are involved in the design of such a frequency synthesizer from the system point of view. These considerations include selection of loop parameters, choice of key building blocks, and critical system performance issues like spurious tones, quantization noise, in-band phase noise, out-of-band phase noise, and frequency accuracy/resolution. Finally, the future possibilities are briefly analyzed.