# Lesson 30 — Demodulation

<p class="block-synopsis">Modulation efficiency, envelope and synchronous detection, and designing the filters.</p>

**Objectives covered**

- **3.2** — I can design a demodulator given a modulated signal for envelope and synchronous detection.

<div class="block-toc">
  <a class="bt-card bt-reading" href="../Block3Reading/Obj02/ECE215_B3_Obj02_Reading.html">
    <span class="bt-kind">Reading</span>
    <h4>Demodulation</h4>
    <p>The course reading for Objective 3.2.</p>
  </a>
  <a class="bt-card bt-flashcards" href="L30_Flashcards.html">
    <span class="bt-kind">Flashcards</span>
    <h4>Review deck</h4>
    <p>Key terms, equations, and ideas from this lesson, in a self-test deck.</p>
  </a>
  <a class="bt-card bt-slides" href="../_static/slides/ECE_215_Lesson30.pdf">
    <span class="bt-kind">Slides</span>
    <h4>Lesson 30 deck</h4>
    <p>The slides used in class, as a PDF.</p>
  </a>
  <a class="bt-card bt-practice" href="../downloads.html">
    <span class="bt-kind">Practice Problems</span>
    <h4>Work these before the quiz</h4>
    <p>Ungraded problems with answers, on the downloads page.</p>
  </a>
  <a class="bt-card bt-demo" href="https://usafa-ece.org/apps/demodulation/" target="_blank" rel="noopener">
    <span class="bt-kind">Demo ↗</span>
    <h4>Demodulation Demo</h4>
    <p>Step through envelope and synchronous AM detector pipelines.</p>
  </a>
</div>