Specifications

Figure 1-16 shows the Cp/Cs and Cs/Cp ratios calculated for dissipation factors from 0.01 to 1.0. As
for inductance, the Lp/Ls ratio is same as Cs/Cp and the Ls/Lp ratio equals Cp/Cs.
Figure 1-16. Relationships of series and parallel capacitance values
For high D (low Q) devices, either the series or parallel model is a better approximation of the real
impedance equivalent circuit than the other one. Low D (high Q) devices do not yield a significant
difference in measured C or L values due to the measurement circuit mode. Since the relationships
between the series and parallel mode measurement values are a function of D
2
, when D is below
0.03, the difference between Cs and Cp values (also between Ls and Lp values) is less than 0.1 per-
cent. D and Q values do not depend on the measurement circuit modes.
Figure 1-17 shows the relationship between series and parallel mode resistances. For high D (low Q)
components, the measured Rs and Rp values are almost equal because the impedance is nearly pure
resistance. Since the difference between Rs and Rp values increases in proportion to 1/D
2
, defining
the measurement circuit mode is vital for measurement of capacitive or inductive components with
low D (high Q.)
Figure 1-17. Relationships of series and parallel resistance values
1
10
100
1000
10000
0.01 0.1 1 10
Dissapation factor
Rp
Rs
1
1.001
1.002
1.003
1.004
1.005
1.006
1.007
1.008
1.009
1.01
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
Dissipation factor
1
0.99
0.999
0.998
0.997
0.996
0.995
0.994
0.993
0.992
0.991
Cs
C
p
Cp
C
s
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Dissipation factor
1
0.5
0.95
0.9
0.85
0.8
0.75
0.7
0.65
0.6
0.55
Cs
C
p
Cp
C
s
Cp
C
s
Cs
C
p
Cp
Cs
Cs
C
p
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