充电泵
锁相环
相位频率检测器
偏移量(计算机科学)
相位噪声
相位检测器
带宽(计算)
采样(信号处理)
探测器
电子工程
功率消耗
计算机科学
噪音(视频)
电气工程
电压
功率(物理)
工程类
物理
电容器
电信
量子力学
人工智能
图像(数学)
程序设计语言
作者
Patrick Kurth,Urs Hecht,Frowin Buballa,Sebastian Linnhoff,Helia Ordouei,Friedel Gerfers
标识
DOI:10.1109/iscas46773.2023.10182081
摘要
In this paper, a novel charge pump for sub-sampling phase-locked loops (SSPLLs) is presented. Contrary to the conventional charge pump, the proposed implementation eliminates the previously-required pulser. This is achieved by using all sample data from the ping-pong sub-sampling phase detector as opposed to only every second point, which enables the charge pump to run pseudo-continuous. This virtually raises the reference frequency by a factor of two, which is beneficial for the phase noise performance of the phase-locked loop while fulfilling the requirements for bandwidth of reference buffers, switches etc. Furthermore, eliminating the pulser enables a highly power-efficient charge pump design, leveraging higher SSPLL FoM. The proposed charge pump is implemented in a 22-nm fully-depleted silicon-on-insulator technology. The power and area consumption are reduced by roughly 80% and 55%, with similar effective gain, noise and offset performance to the conventional design.
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