Frequency Response (See Table 4-13); Additional Dpll Lc Filter Component Example - Intel 810A3 Design Manual

Layout and Routing Guidelines
Table 4-12. Additional DPLL LC Filter Component Example
Component
Capacitor
Inductor
As an example,
inductor values shown in
the resistance was swept for four different combinations of resistance (the resistance of the
discrete/trace resistor and the resistance of the inductor), each resulting in a different series
resistance. In addition, different values for the resistance of the inductor were assumed based on its
max and typical DC resistance. This is summarized in
frequency response curves shown in
Figure 4-38. Frequency Response (see Table 4-13)
4-38
Manufacturer
KEMET
muRATA
Figure 4-38 is a Bode plot showing the frequency response using the capacitor and
Table 4-12. The capacitor and inductor values were held constant while
0
-10
D b
-20
-30
-40
0.100E-05
Part No.
T495D336MD16AS
LQG21NR10K10
Table 4-13. This yielded the four different
Figure 4-38.
Magnitude Response (VCCA)
Curve 3
Curve 0
Curve 1
0.01
0.100E-3
M H z
Description
33 µF ±20%, 16VDC,
ESR=0.225 Ω @ 100 kHz,
ESL=2.5 nH
100 nH ±10%, 250 mA,
Max dc resistance = 0.26 Ω,
size=0805,
magnetically shielded
Curve 2
1
1 0 0
®
Intel 810A3 Chipset Design Guide