An Improved Charge-Averaging Charge Pump for a Fractional-N Frequency Synthesizer
作者机构：中国科学院微电子研究所北京100029
基 金：国家自然科学基金(批准号:60276021) 国家重点基础研究发展规划(批准号:G2002CB311901)资助项目
出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)
年 卷 期：2008年第29卷第5期
页 码：913-916页
摘 要：An improved charge-averaging charge pump and the corresponding circuit implementation are presented. The charge-averaging charge pump proposed by Koo is analyzed and a new scheme is proposed. This new scheme decreases power by 1/3 and eliminates the practical defects in the original. Spectre Verilog behavioral simulation results show that the proposed scheme can strongly reduce the energy of spurs. Circuit implementation of this new charge pump for a frequency synthesizer with a fractional division ratio of 1/3 is then presented and multi-level simulation is performed to validate its feasibility at the circuit level. The simulation results show this new scheme outputs a flat voltage curve in a locked state and can thus effectively suppress fraction spurs.
主 题 词：charge-averaging charge pump spur
学科分类：080902[080902] 0809[工学-计算机类] 08[工学]
核心收录：
D O I：10.3321/j.issn:0253-4177.2008.05.021
馆 藏 号：203501996...
