參數(shù)資料
型號(hào): XR2211CP
廠商: Exar Corporation
文件頁(yè)數(shù): 8/24頁(yè)
文件大?。?/td> 242K
代理商: XR2211CP
XR-2211
8
Rev. 3.01
DESIGN EQUATIONS
(All resistance in , all frequency in Hz and all capacitance in farads, unless otherwise specified)
(See Figure 3 or definition of components)
1.
VCO Center Frequency, f
O
:
f
O
1
R
0
·C
0
2.
Internal Reference Voltage, V
REF
(measured at pin 10):
V
REF
V
CC
2
–650mV in volts
3.
Loop Low-Pass Filter Time Constant, :
C
1
·R
PP
(seconds)
where:
R
PP
R
1
·R
F
R
1
R
F
if R
F
is
4.
or C
F
reactance is
Loop Damping, :
, then R
PP
= R1
1250·C
0
R
1
·C
1
Note:
For derivation/explanation of this equation, please see TAN-011.
5.
Loop-tracking
bandwidth,
f
f
0
f
f
0
R
0
R
1
Tracking
Bandwidth
f
f
f
LL
f
1
f
2
f
O
f
LH
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