JSSC 2008第4期Clocking & PLLs

A Design Method and Developments of a Low-Power and High-Resolution Multiphase G

提出了一种低功耗高分辨率多相位耦合振荡器的设计方法及其应用。

32 ps分辨率, 490 MHz频率, 1 mA功耗, 123 MHz频率

耦合振荡器多相位低功耗高分辨率电平移位

▸创新点1：耦合振荡器拓扑分析方法创新，提出了一种实用的耦合振荡器设计方法，通过详细分析拓扑结构，优化了振荡器的相位精度和功耗表现，实现了490MHz下32ps的高分辨率和0.8-1.0 LSB的相位精度。

▸创新点2：nMOS相位耦合器技术创新，通过引入nMOS相位耦合器，显著提升了振荡频率，同时保持了低功耗特性，适用于DVD写入策略等高速信号处理系统。

▸创新点3：新型多相电平移位系统(M-LS)电路创新，设计了无短路电流的多相电平移位系统，大幅降低了功耗，在123MHz下实现了0.5 LSB的高相位精度，功耗仅为1mA，特别适合移动电话等低功耗应用场景。

▸创新点4：电阻环相位精度提升方法创新，将电阻环技术应用于M-LS系统，进一步提高了输出相位的准确性，为多相时钟生成提供了有效的精度优化方案。

Abstract

, Y usuke Tokunaga, Takashi Morie, and Shiro Dosho , Member , IEEE Abstract—A practical method for coupled oscillator design is elaborated. The topology analysis of a coupled oscillator , the ways of simulating its sensitivity, initializing its operation, and the oscil- lation frequency enhancement with nMOS phase couplers are pre- sented. We have developed a write strategy system for DVD with a coupled oscillator using these techniques. In addition, we have also developed a low-power-oriented m