EEE 227 (electronics 2)

1. EEE 227
Electronics II
11/25/2016 Sites.google.com/site /arif08eee 1

2. • Pre-requisite: EEE 221 (Electronics I)
• Textbook: Electronics Devices by R.L.Boylestad
• Reference: Electronics Principles by Malvino
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A capacitor passes a high frequency signal easily, but resists low frequency
ones. While an inductor does the opposite: it pass low-frequency easily, and
impedes high frequency. In fact, inside most speaker enclosures you'll find an
inductor used on the woofer to pass the low-frequency energy to the woofer,
while a capacitor is used with the tweeter to pass the high-frequency energy
to the tweeter.
The reason to use an inductor there is that it doesn't "consume" or "waste"
the high frequency energy, it just blocks it from passing, so that energy can
then pass through the capacitor, to the tweeter, instead.
In general, the behavior of an inductor is the dual to that of a capacitor, so
most functions that require one can be implemented by using the other, but
in a different arrangement. But that's not always true.
Why capacitor is used as filter but not the inductor
Ref: http://electronics.stackexchange.com/questions/77763/inductors-what-are-
they-used-for

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