Circuit Theory-2 #22 | Band-Pass Filters, Resonance and Q

Instructor: Dr. Süleyman Burak ÇELİK

In this Circuit Theory-2 lesson we move from low-pass and high-pass filters to the middle of the frequency axis: band-pass behavior. You will learn: - What a band-pass filter does - How a series RLC circuit becomes a passive band-pass example - Why resonance happens when inductive and capacitive reactance cancel - How the center frequency is set by L and C - How the magnitude response rises, peaks, and falls - Why the -3 dB frequencies define bandwidth - What the quality factor Q means - How phase changes below, at, and above resonance - A quick design example using L, C, and R - Common traps: resonance vs bandwidth, high Q vs broad response, and loading effects Timestamps: 00:00 Band-pass filters, resonance and Q 00:03 From one side to the middle 00:31 Band-pass landmarks 00:55 Series RLC band-pass 01:20 Resonance condition 01:42 Magnitude response 02:10 Bandwidth from -3 dB edges 02:32 Quality factor Q 02:59 Phase and energy exchange 03:23 Design example 03:49 Common traps 04:17 Wrap Next lesson: band-reject filters and passive filter examples. Part of the Circuit Theory-2 playlist by AcEdumy.