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Direct Period Synthesis for Achieving Sub-PPM Frequency Resolution Through Time Average Frequency: The Principle, The Experimental Demonstration, and Its Application in Digital Communication

机译:通过时间平均频率实现Sub-PPM频率分辨率的直接周期合成:原理,实验论证及其在数字通信中的应用

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Direct period synthesis is a technique of using a base time unit and the time-average-frequency concept to synthesize clock frequency. Its distinguished capabilities include generating frequencies in very fine step and switching frequency in very fast speed. In this paper, the principle of fine frequency generation is presented. Using data collected from two 55-nm CMOS chips, experimental evidence of sub-ppm (0.04 ppm at finest) frequency resolution at 27 MHz, 1.5 GHz, and 2.4 GHz is provided. This feature of fine frequency resolution is very important in digital communication, especially for plesiochronous and heterochronous systems. It is a circuit level enabler for system level innovation. In the last part of this paper, several important applications of using these capabilities are explored.
机译:直接周期合成是一种使用基本时间单位和时均频率概念来合成时钟频率的技术。其卓越的功能包括以非常精细的步长生成频率以及以非常快的速度生成切换频率。本文提出了精细频率产生的原理。使用从两个55纳米CMOS芯片收集的数据,提供了在27 MHz,1.5 GHz和2.4 GHz下亚ppm(最好为0.04 ppm)频率分辨率的实验证据。精细的频率分辨率特性在数字通信中非常重要,特别是对于准同步和异时系统。它是系统级创新的电路级使能器。在本文的最后一部分,探讨了使用这些功能的几个重要应用程序。

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