CHAPTER 6
Active Filters
A filter is a frequency-selective electric circuit that passes electrical signals of a specified frequency and attenuates the other frequencies. Filters are classified into active and passive filters. Passive filters are realized with inductors, capacitors and resistors. Active filters are realized with op-amp in addition to capacitors and resistors. The problem with the passive filter is the size of the inductors to be used for low-frequency applications. Active filter does not require an inductor at all. For frequencies more than 1 MHz, where the op-amps performances are limited beyond this 1 MHz, passive filters are recommended. However many high-frequency applications such as radio transmitters and receiver passive ...
Get Operational Amplifiers with Advanced Applications, 1st Edition by Pearson now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
