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The tuning application, for instance, is an example of band-pass filtering. The RLC filter is described as a second-order circuit, meaning that any voltage or current in the circuit can be described by a second-order differential equation in circuit analysis. The three circuit elements, R, L and C, can be combined in a number of different ...
The current entering any junction is equal to the current leaving that junction. i 2 + i 3 = i 1 + i 4. This law, also called Kirchhoff's first law, or Kirchhoff's junction rule, states that, for any node (junction) in an electrical circuit, the sum of currents flowing into that node is equal to the sum of currents flowing out of that node; or equivalently:
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Lecture - 6 2nd Order Circuits:Magnetically Coupled Circuits (YouTube video). Lecture Series on Circuit Theory. New Delhi: National Programme on Technology Enhanced Learning. S.C.Dutta Roy (28 April 2008). Lecture - 7 Transformer Transform Domain Analysis (YouTube video). Lecture Series on Circuit Theory.
The RLC filter is described as a second-order circuit, meaning that any voltage or current in the circuit can be described by a second-order differential equation in circuit analysis. The three circuit elements can be combined in a number of different topologies. All three elements in series or all three elements in parallel are the simplest in ...
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For example, a second-order Butterworth filter, which has maximally flat passband frequency response, has a of /. By comparison, a value of Q = 1 / 2 {\displaystyle Q=1/2} corresponds to the series cascade of two identical simple low-pass filters.