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基于数字方式实现的锁相环自测试电路

更新时间:2020-07-04 01:15:27 大小:2M 上传用户:zhiyao6查看TA发布的资源 标签:锁相环 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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时钟抖动、时钟精度和锁相环倍频功能是否符合预定规格是评价锁相环好坏的重要参数,但高精度的锁相环对应的测试设备昂贵、测试周期长且需要专业人士进行操作,大大增加了中小型设计公司项目的测试成本和时间。本文介绍了一种自主研发的数字电路,该电路采用纯数字方式实现锁相环(PLL)的功能测量、精度测量(〈0.1%)和时钟抖动测量(峰一峰值Jpp〈100ps,均方根值Jrms〈15ps)。

Clock jitter, clock precision and frequency multiplication function are the most important parameters of a Phase-Locked Loop (PLL), they usually be used to evaluate the PLL' s performance. But for the high accuracy Phase-Locked Loop, the corresponding testing equipment is expensive, test period is long and professionals are need-ed to operate, that greatly increases the small-and medium-sized design company' s burden, not only the money, but also the time. This paper introduces a kind of digital circuit which is independent research and development, the circuit adopts pure digital method to implement the function test, precision measurement (〈 0.1%) and clock jitter measurement (peak-peak Jpp 〈 lOOps, root-mean-square value Jrms 〈 15 ps) of Phase-Lock...

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