← 返回 JSSC 论文列表JSSC 2010第3期Clocking & PLLs90nmClock Generation
A 71 mW 10 GHz All Digital Frequency Synthesizer With Dynamically Reconfigured Di
一款10 GHz全数字频率合成器,采用动态重构数字环路滤波器,实现快速锁定与低噪声。
90nm CMOS, 1V/3.3V, 9.92GHz, 0.9ps rms jitter, 7.1mW core power
全数字锁相环频率合成器动态重构低抖动快速锁定
▸创新点1:动态数字环路滤波器(系统创新) - 该滤波器在频率捕获和相位跟踪过程中自动重新配置,通过动态调整环路带宽实现快速锁定和低噪声的双重优化,锁定时间小于7微秒,显著提升了系统性能。
▸创新点2:锁定过程监控器(LPM)(方法创新) - 提出的LPM实时监测锁定过程,动态调整环路参数,确保在不同工作阶段(如频率捕获和相位跟踪)中系统始终处于最优状态,从而提高了整体稳定性和效率。
▸创新点3:偏斜补偿相位累加器(电路创新) - 通过创新的电路设计解决了高速操作中的时序偏斜问题,同时保持了低功耗特性,使相位累加器在10 GHz高频下仍能稳定工作,实测均方根抖动仅为0.9 ps。
▸创新点4:低功耗与高集成度(系统创新) - 采用90 nm CMOS工艺实现,核心面积仅0.352 mm²,功耗低至71 mW(核心7.1 mW @1V,I/O 2.7 mW @3.3V),在性能和能效方面达到领先水平。
Abstract
A 10 GHz all digital frequency synthesizer (ADPLL)
with dynamic digital loop filter is presented. Governed by a pro-
posed locking process monitor (LPM), the digital loop filter is auto-
matically reconfigured during the frequency acquisition and phase
tracking process. The loop bandwidth is also self-adjusted during
the locking process so as to achieve fast lock and low noise simulta-
neously. A skew-compensated phase accumulator is proposed for
high speed operation, which preserves the advantages