What is an LC Filter? | Coilcraft
What is an LC Filter? | Coilcraft
Jun 27, 2020
coilcraft.com
Let’s find the magnitude frequency response of this RL circuit to determine what type of filter it operates as. We’ll start by converting the circuit to the 𝑠 domain and evaluating its transfer function 𝐻(𝑠). To study the frequency response, we’ll replace 𝑠 by 𝑗𝜔 and find the magnitude frequency response |𝐻(𝑗𝜔)|. Looking at the graph, we see a low-pass filtering effect. An ideal low-pass filter looks like a brick wall — a cutoff frequency before which there is a flat gain of 1 and after
2:59
Let’s find the magnitude frequency response of this RL circuit to determine what type of filter it operates as. We’ll start by converting the circuit to the 𝑠 domain and evaluating its transfer function 𝐻(𝑠). To study the frequency response, we’ll replace 𝑠 by 𝑗𝜔 and find the magnitude frequency response |𝐻(𝑗𝜔)|. Looking at the graph, we see a low-pass filtering effect. An ideal low-pass filter looks like a brick wall — a cutoff frequency before which there is a flat gain of 1 and after
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