參數(shù)資料
型號: LMX9830
廠商: National Semiconductor Corporation
英文描述: BluetoothTM Serial Port Module
中文描述: 藍(lán)牙串口模塊
文件頁數(shù): 26/46頁
文件大小: 664K
代理商: LMX9830
www.national.com
26
L
9.0 Digital Smart Radio
(Continued)
The third order loop filter being defined has the following topology. shown in Figure 19..
and
Calculate the poles and zeros. Use exact method to solve for T1 using numerical methods,
Calculate the loop filter coefficients,
l
Summary;
Figure 19. Third Order Loop filter
N
F
F
comp
--------------
=
ω
C
2
π
F
C
=
φ
tan
1
=
C
T1 T1
T31
+
----------------------------------------------
tan
1
ω
C
T1
(
)
tan
1
ω
C
T1 T31
(
)
T3
T31
T1
×
=
T2
ω
C
2
T1
T3
+
(
)
---------------------------------------
=
A0
K
φ
K
ω
C
2
N
-----------------------
1
ω
2
T2
2
+
T1
)
1
1
(
ω
C
2
ω
C
2
T3
2
+
(
)
+
-----------------------------------------------------------------------------
=
A1
A0
T1
T3
+
(
)
=
A2
A0 T1 T3
=
Symbol
Description
Units
n
N counter value
None
Loop Bandwidth
rad/s
T1
Loop filter pole
S
T2
Loop filter zero
S
T3
Loop filter zero
S
A0
Total capacitance
nF
A1
First order loop filter coefficient
nFs
A2
Second order loop filter coefficient
nFs2
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