參數(shù)資料
型號(hào): M2006-01-669.1281
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi): 數(shù)字傳輸電路
英文描述: ATM/SONET/SDH SUPPORT CIRCUIT, QCC36
封裝: 9 X 9 MM, SMT-36
文件頁(yè)數(shù): 3/10頁(yè)
文件大小: 911K
代理商: M2006-01-669.1281
Micro Networks 324 Clark Street Worcester, MA 01606 tel: 508-852-5400 fax: 508-852-8456 www.micronetworks.com
3
M2006-01
Prelimnary Specifications
Micro Networks
An Integrated Circuit Systems Company
FUNCTIONAL DESCRIPTION
LOOP FILTER
FIGURE 2
The M2006-01 requires the use of an external loop
filter via the provided filter pins. Due to the
differential design, the implementation requires two
identical RC filters as shown in Figure 2.
Rloop
Rloop
Cloop
Cloop
Cpost
Cpost
Rpost
Rpost
TABLE 1. EX AMPLE OF LOOP FILTER VALUES
Input Reference Frequency = 19.44MHz; VCSO Frequency = 622.0800MHz
PLL
Damping
Factor
2.0
2.0
2.7
R loop
C loop
R post
C post
Bandwidth
330Hz
1015Hz
1975Hz
3.9K
12K
24K
2.2
μ
F
.22
μ
F
.1
μ
F
20k
20k
20k
250pF
250pF
250pF
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