Figure 10-2.-Crossover frequency of a 0.05-microfarad capacitor with various lead lengths.
The curves in figure 10-3 compare the bypass
filtered and the shield used to isolate the filtered
value of a feedthrough capacitor of 0.05 µF with that
source. Lead length has been reduced to zero. The
of a hypothetically perfect capacitor of the same
center conductor of the feedthrough capacitor must
capacitance. The feedthrough capacitor differs from
carry all the current of the filtered source and must
the capacitor with leads in that the feedthrough
have an adequate current rating to ensure against dc
capacitor type forms a part of both the circuit being
loss or power frequency insertion loss. The internal
Figure 10-3.-Crosover frequency of a 0.05-microfarad feedthrough capacitor.