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JSSC 2006第12期Power Management0.18μm CMOSCharge PumpPLL

A 05-GHz to 25-GHz PLL With Fully Differential Supply Regulated Tuning

本文介绍了一种适用于高缩放工艺的宽范围时钟生成PLL,采用全差分电源调节调谐方案。
0.5至2.5 GHz频率范围,2.4 GHz时功耗14 mA,抖动2.36 ps rms
PLL全差分电源调节电荷泵闪烁噪声时钟生成
创新点1:全差分电源调节调谐方案(电路创新)。该方案通过全差分结构有效抑制电源噪声,提升PLL在高度缩放工艺中的稳定性,显著降低抖动至2.36 ps rms。
创新点2:电荷泵使用电阻而非有源电流源(电路创新)。采用电阻定义泵电流,减少了电荷泵的闪烁噪声,提高了时钟信号的纯净度,适用于高频应用。
创新点3:减少电荷泵闪烁噪声(方法创新)。通过优化电荷泵设计,显著降低了低频噪声,提升了PLL在0.5至2.5 GHz宽频率范围内的性能。
创新点4:宽频率范围设计(系统创新)。该PLL在0.18μm CMOS工艺下实现了0.5至2.5 GHz的宽频率范围,适用于多种通信和计算应用,功耗仅为14 mA@1.8V。
Abstract
This paper describes a wide-range clock generation phase-locked loop (PLL) incorporating several features that make it suitable for integration in highly scaled processes. A fully dif- ferential supply regulated tuning scheme is used to combat power supply noise. The charge pump uses a resistor rather than an active current source to define the pumping current in order to reduce the charge pump flicker noise. Fabricated in a 0.18- m CMOS process, the PLL occupies 0.15 mm /50die area and achieves a