參數(shù)資料
型號: EL4584C
英文描述: Horizontal Genlock(PLL sub system)(水平發(fā)生鎖定器(鎖相環(huán)附屬系統(tǒng)))
中文描述: 水平同步鎖相(PLL頻率分制)(水平發(fā)生鎖定器(鎖相環(huán)附屬系統(tǒng)))
文件頁數(shù): 3/16頁
文件大小: 275K
代理商: EL4584C
EL4584C
Horizontal Genlock 4 FSC
transfer function CveF(VC) where VC is the
reverse bias control voltage and CV is varactor
capacitance
Since F(VC) is nonlinear it is
probably best to build the VCO and measure
KVCO about 25V The results of one such mea-
surement are shown below The slope of the
curve is determined by linear regression tech-
niques and equals KVCO For our example
KVCO e 605 MradSV
FOSC vs VC LCVCO
4584 – 14
5 Now we can solve for C3 C4 and R3
C3 e
KdKVCO
N
02n
e
(477e b 5)(605e6)
(910)(5000)2
e
001
mF
C4 e
C3
10
e
0001
mF
R3 e
2N
g
0n
KdKVCO
e
(2)(910)(1)(5000)
(477e b 5)(605e6)
e
315 k
X
We choose R3 e 30 kX for convenience
6 Notice R2 has little effect on the loop filter de-
sign R2 should be large around 100k and can
be adjusted to compensate for any static phase
error Ti at lock but if made too large will
slow loop response If R2 is made smaller Ti
(see timing diagrams) increases and if R2 in-
creases Ti decreases For LDET to be low at
lock
lTil k 50 ns C4 is used mainly to attenu-
ate high frequency noise from the charge
pump
Lock Time
Let
SeR3C3 As T increases damping increases
but so does lock time Decreasing T decreases
damping and speeds up loop response but in-
creases overshoot and thus increases the number
of hunting oscillations before lock Critical damp-
ing (
ge1) occurs at minimum lock time Because
decreased damping also decreases loop stability
it is sometimes desirable to design slightly over-
damped (
gl1) trading lock time for increased
stability
Typical Loop Filter
4584 – 16
LC Loop Filter Components (Approximate)
Frequency
R2
R3
C3
C4
(MHz)
(kX)(kX)(mF)
(mF)
13301
100
30
001
0001
135
100
30
001
0001
1475
100
33
001
0001
17734
100
39
001
0001
10738
100
22
001
0001
12273
100
27
001
0001
14318
100
30
001
0001
Xtal Loop Filter Components (Approximate)
Frequency
R2
R3
C3
C4
(MHz)
(kX)(MX)
(pF)
13301
100
43
68
135
100
43
68
1475
100
43
68
17734
100
43
68
10738
100
43
68
12273
100
43
68
14318
100
43
68
11
相關PDF資料
PDF描述
EL4585 Horizontal Genlock, 8 FSC
EL4585C Horizontal Genlock, 8 FSC
EL4585CN Horizontal Genlock, 8 FSC
EL4585CS Horizontal Genlock, 8 FSC
EL5144C 103dB SNR Stereo ADC with Single-Ended Inputs 20-SSOP -40 to 85
相關代理商/技術參數(shù)
參數(shù)描述
EL4584CN 功能描述:IC PLL VIDEO GP 36MHZ 16-DIP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:- 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:*
EL4584CS 功能描述:IC PLL VIDEO GP 36MHZ 16-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:- 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:*
EL4584CS-T13 功能描述:IC GENLOCK HORZ 4FSC 16-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:- 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:*
EL4584CST-13 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Horizontal Genlock, 4FSC
EL4584CS-T7 功能描述:IC PLL VIDEO GP 36MHZ 16-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:- 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:*