參數(shù)資料
型號: tda 6930
廠商: SIEMENS AG
英文描述: Multistandard VIF-PLL(多級標(biāo)準(zhǔn)的VIF-PLL)
中文描述: 多標(biāo)準(zhǔn)資料表格鎖相環(huán)(多級標(biāo)準(zhǔn)的資料表格,鎖相環(huán))
文件頁數(shù): 26/36頁
文件大?。?/td> 822K
代理商: TDA 6930
Applications
4 - 9
TDA 6930
Wireless Components
Specification, August 1999
I
Application note 3 : Equations
Resonance frequency :
Damping factor:
ν
=
π
fn C
LF
R
LF
μ
A
–––
rad
Phase detector gain:
K
OI
= 250
MHz
––––
V
VCO-gain:
K
O
= 2
π
2
with tank circuit: 120 nH
||
18 pF
Loopfilter capacitor:
C
LF
recommended
C
LF
= 1
μ
Loopfilter resistor:
R
LF
recommended
R
LF
= 120
A second capacitor in parallel with R
LF
is recommend
to reduce the response at
250 kHz
C
P
= 4.7 nF
Values:
With the recommend tank circuit and loopfilter
VCO range:
fpp = 4 MHz
Resonance frequency:
fn = 9 kHz
Damping factor:
ν
= 8.5
Loop cut off frequency:
f
-3dB
= 100 kHz
1
K
O
K
DI
fn = –––
––––––––
2
π
C
LF
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