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AN-0988

更新时间： 2024-10-28 12:50:59

品牌	Logo	应用领域
亚德诺 - ADI		振荡器晶体振荡器时钟
页数	文件大小	规格书
8页	388K
描述
The AD9552: A Programmable Crystal Oscillator for Network Clocking Applications

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AN-0988 数据手册

AN-0988

APPLICATION NOTE

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com

The AD9552: A Programmable Crystal Oscillator for Network Clocking Applications

by Ken Gentile

The ubiquitous quartz crystal oscillator has been the workhorse

of timekeeping applications for decades. Low cost, coupled with

relatively high stability, is the driving force behind the success of

the quartz crystal oscillator in a broad range of applications.

The high resonant Q factor makes the quartz crystal oscillator

an attractive candidate for the resonant element in fixed fre-

quency oscillators. However, an ever-increasing number of

network clock applications require a stable, single frequency

oscillator as a source for synthesizing different network

frequencies. The AD9552 is a low cost, integrated solution

for such applications.

PLL

VOLTAGE

CONTROLLED

OSCILLATOR

f_REF

QUARTZ

CRYSTAL

OSCILLATOR

PHASE

DETECTOR

LOOP

FILTER

f_OUT= N × f_REF

FEEDBACK

DIVIDER

(N)

Figure 1. PLL-Based Frequency Upconverter

Rev. 0 | Page 1 of 8

12 3 4 5 6 7 8

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