Circuit Theory-2 #23 | Band-Reject Filters and Passive Filter Examples

Instructor: Dr. Süleyman Burak ÇELİK

In this Circuit Theory-2 lesson we invert the band-pass idea and build band-reject, or notch, behavior from passive components. You will learn: - What a band-reject filter does - Why a narrow band-reject filter is called a notch filter - How the lower edge, upper edge, center frequency, and reject bandwidth fit together - How a series LC shunt branch creates a passive notch - Why the same resonance formula sets the notch center - How notch depth and bandwidth differ in real components - How passive low-pass, high-pass, band-pass, and band-reject examples compare - A quick 5.03 kHz notch design using L and C - Why source resistance, load resistance, component loss, and tolerance matter - A practical recipe for choosing passive filter topologies Timestamps: 00:00 Band-reject filters and passive examples 00:03 From band-pass to band-reject 00:24 Band-reject landmarks 00:48 Passive notch topology 01:12 Center frequency 01:36 Magnitude response 02:01 Reject bandwidth and depth 02:23 Four passive filter examples 02:47 Notch design example 03:14 Loading and tolerance traps 03:37 Practical passive-filter recipe 04:01 Wrap Next lesson: active filters and op-amp filter intuition. Part of the Circuit Theory-2 playlist by AcEdumy.