MM0704, Lesson 2
Figure 2-4. Comparison of Filter Quality.
through the capacitor passes through the coil, whose reactance at low frequencies is small. The result is that it does not
reach the output. For high-frequency currents, the capacitive reactance is small, and the inductive reactance is large.
Consequently, these currents pass readily through the capacitor to the output and very little current is diverted through
the coil.
The output voltage of the high-pass filter in figure 2-5, is developed across the coil. This high-pass filter develops
enough voltage across the coil at high frequencies to perform required functions.
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