• 參數(shù)資料
    型號: CD-700-KAF-GBB-16.384
    廠商: VECTRON INTERNATIONAL
    元件分類: XO, clock
    英文描述: PHASE LOCKED LOOP, CQCC16
    封裝: 5 X 7.50 MM, 2 MM HEIGHT, HERMETIC SEALED, CERAMIC, SMD-16
    文件頁數(shù): 13/14頁
    文件大?。?/td> 123K
    代理商: CD-700-KAF-GBB-16.384
    CD-700, VCXO Based PLL
    Vectron International, 267 Lowell Rd, Hudson NH 03051-4916
    Tel: 1-88-VECTRON-1
    Web: www.vectron.com
    Page 8 of 14
    Rev : 06Apr08
    Figure 7. SPICE Model
    *****CD-700 ac Loop model
    vi 1 0 ac 1
    ri 1 0 1k
    *****Phase Detector
    e1 2 0 1 0 1
    (for closed loop response use: e1 2 0 1 12 1)
    r2 2 3 30k
    c1 3 0 60p
    *****Phase Detector Gain=0.53 x Data Density (Data Density = 1 for clocks) for 5 volt
    operation and = 0.35 x Data Density for 3.3 volt operation
    e2 4 0 3 0 .35
    *****Loop filter
    r1 4 5 60k
    c2 5 0 10p
    rf 5 6 90k
    cf 6 7 1.0u
    e3 7 0 5 0 –10000
    ***** VCXO, Input Bandwidth=50kHz
    r5 7 8 160k
    c4 8 0 20p
    *****VCXO Gain x 2
    ∏ (Example: 19.440 MHz x 100 ppm x 2 x ∏)
    e4 9 0 8 0 12214
    *****1/S model
    r6 9 10 1000
    c5 10 11 0.001u
    e5 11 0 10 0 –1e
    6
    ****Divide by n
    e6 12 0 11 0 1
    r7 12 0 1k
    The bold numbers are user selectable R and C values that will vary depending
    on the application (see Figure 11).
    Vi
    Ri
    E1 R2 C1
    E2 R1
    C2
    Rf
    Cf
    E3
    R5 C4
    E4
    R6 C5
    E5
    E6
    R7
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
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