Lesson 15 — Frequency Domain and Ideal Filters

Time versus frequency, bandwidth, and the four ideal filter types.

Objectives covered

• 2.1 — I can graph a given sinusoidal signal, including DC components, in both the time and frequency domains and determine its bandwidth.

• 2.2 — I can identify types of ideal filters, determine their cutoff frequencies, and analyze their output given an input sinusoidal signal or signal spectrum.

Due at this lesson

Quiz 3 (Obj 1.6–1.7) — due 21 Sep 2359

Reading · Objective 2.1

The Frequency Domain

The course reading for Objective 2.1.

Reading · Objective 2.2

Ideal Filters

The course reading for Objective 2.2.

Flashcards

Review deck

Key terms, equations, and ideas from this lesson, in a self-test deck.

Slides

Lesson 15 deck

The slides used in class, as a PDF.

Practice Problems

Work these before the quiz

Ungraded problems with answers, on the downloads page.

Demo ↗

Filter Demo

Hear low-, high-, and band-pass filters applied to live audio.