A 2-to-2.4-GHz differentially-tuned fractional-N frequency synthesizer for DVB tuner applications  

作　　者：孟令部 卢磊 赵薇 唐长文 

机构地区：[1]State Key Laboratory of ASIC & System,Fudan University

出　　处：《Journal of Semiconductors》2010年第7期108-114,共7页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.60876019);the National S&T Major Project of China(No. 2009ZX0131-002-003-02);the Shanghai Rising-Star Program,China(No.09QA1400300);the National Scientists and Engineers Service for Enterprise Program,China(No.2009GJC00046).

摘　　要：This paper describes the design of a fractional-N frequency synthesizer for digital video broadcasting-terrestrial （DVB-T） receivers.Transfer functions in differentially-tuned PLL are derived and loop parameters are designed. In addition,a fully-differential charge pump is presented.An 8/9 high speed prescaler is analyzed and the design considerations for the CML logic are also presented.Test results show that the RMS phase error is less than 0.7°in integer-N mode and less than 1°in fractional-N mode.The implemented frequency synthesizer draws 10 mA from a 1.8-V supply while occupying a die area of about 1-mm^2 in a 0.18-μm CMOS process.This paper describes the design of a fractional-N frequency synthesizer for digital video broadcasting-terrestrial （DVB-T） receivers.Transfer functions in differentially-tuned PLL are derived and loop parameters are designed. In addition,a fully-differential charge pump is presented.An 8/9 high speed prescaler is analyzed and the design considerations for the CML logic are also presented.Test results show that the RMS phase error is less than 0.7°in integer-N mode and less than 1°in fractional-N mode.The implemented frequency synthesizer draws 10 mA from a 1.8-V supply while occupying a die area of about 1-mm^2 in a 0.18-μm CMOS process.

关 键 词：frequency synthesizer fully-differential phase noise charge pump 

分 类 号：TN74[电子电信—电路与系统] TN948.55