CX28344 Conexant, CX28344 Datasheet - Page 183

• Manufacturer Part Number: CX28344
• Description: (CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
• Manufacturer: Conexant

CX28342/3/4/6/8 Data Sheet
28348-DSH-001-B
Substituting the values for the
system shown in
in the coefficients shown to the
right. k
into the CX28344 and is a constant.
k
frequency range of 300 ppm over
the control voltage range of 2.67
volts.
Substituting the values of 4.75 K
for the resistors and 0.1
capacitor:
The result for the natural frequency
of the system is:
and the damping factor is:
3
is from the VCO and has a
1
is the phase detector built
Figure A-1
µ
Analyzing the circuit in
VCO can be substituted into the derived equations.
The results from the analysis show a good damping factor of 0.765 and a natural
frequency of 996 rad/s. Although it would be better to get the natural frequency lower
so that more high frequency jitter would be filtered, the system response would suffer.
F for the
result
Mindspeed Technologies™
n
k
2
b
k
a
k
3
k
R
1
1
k
Figure A-1
1
16
2
R
R
k
R
2
1
2
3
R
2
2
a
1
C
3
16
2
1
v
R
1
f
2
b
996
32
C
. 4
. 0
2105
the values for the resistors, capacitor, and the
1
k
31580
75
4775
1
n
k
K
1053
2
. 4
k
3
75
K
(/s)
(rad/v-s)
. 4
. 0
( ~159 Hz )
(/s)
(v/rad)
75
765
K
1
2
Dejitter Circuit Analysis
A
-
7