题目/Title:用于数据转换器的时钟合成器设计
Design of CMOS Clock Synthesizer for Data Converters
作者/Author:杨跃进,李国林
Yuejin Yang,Guolin Li
期刊/Journal:微电子学 Microelectronics
年份/Issue Date:2008.Oct.
卷(期)及页码/Volume(No.)&pages:Vol.38, No.5, pp. 740 - 747
摘要/Abstract:
设计了一种用于数据转换器的低抖动锁相环时钟合成器.基于一阶锁相环结构,提出新的系统分析线性模型,改进了片上无源离散环路滤波器,大大缩短了设计周期.该21.88 MHz时钟合成器采用0.18 μm CMOS混合信号工艺,在1.8 V电源电压下,电荷泵和压控振荡器功耗为410 μA.时钟合成器在1 MHz频偏处相位噪声为-114 dBc/Hz.
A CMOS PLL clock synthesizer for ADC clock applications was designed.Based on Type I PLL architecture,a new linear model for system-level analysis was presented,and an improved on-chip passive discrete-time loop filter was proposed,which drastically shorten time-to-market. The 21.88 MHz clock synthesizer demonstrator test chip has been fabricated in a mixed-signal 0.18um CMOS process.The charge pump and VCD core on the chip consume 410uA of power from a 1.8-V supply.The synthesizer has a phase noise of -114 dBc/Hz at 1MHz offset.