
Principles of Analog Electronics
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getting to the heart or lung. In computer programming, a lter can be used to
remove or insert headers or control characters in data. In graphic applications,
a lter can be applied to a picture to create various effects.
7.3.1 Low-Pass RC Filter
The circuit described here is an example of a low-pass lter, so called because it
discriminates in frequency in such a way that low-frequency sinusoidal signals pass
unchanged, while high-frequency signals undergo greater and greater reductions
in amplitude as the frequency value increases.
The simplest realization of such a lter is the RC series circuit, so called ...