In addition, there can be multiple circuits that produce the same type of filtering behavior, but with different bandwidth and rolloff. Because the function of an RLC filter can get a bit complex, it’s not always obvious how they enact filtering action at the output port. These circuits provide essential functions like filtering with simple component arrangements, and they make possible a range of applications as diverse as antenna impedance matching and PDN decoupling. RLC circuits are so ubiquitous in analog circuits that many modern applications can’t operate without them. These circuits are simple to design and analyze with Ohm’s law and Kirchhoff’s laws.īand-stop filters work just like their optical analogues RLC circuits are normally analyzed as filters, and there are two RLC circuits that can be specifically designed to have a band-stop filter transfer function. Band-stop filters can be built as active filters or as RLC circuits.
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