Amplitude modulations for modulation indices: 50% (under modulated), 100% and 150% (over modulated). In the figure, the carrier wave frequency is 10 times the modulation signal frequency.
Originally by <a href="//commons.wikimedia.org/wiki/User:The.ever.kid" title="User:The.ever.kid">The.ever.kid</a>, drawn using Mathematica and Adobe Illusttrator and simplified version drawn by hand using a text editor.<br>Simplified hand-drawn version by <a href="//commons.wikimedia.org/wiki/User:Krishnavedala" title="User:Krishnavedala">Rubber Duck</a> <small>(<a href="//commons.wikimedia.org/wiki/User_talk:Krishnavedala" title="User talk:Krishnavedala">☮</a> • <a href="//commons.wikimedia.org/wiki/Special:Contributions/Krishnavedala" title="Special:Contributions/Krishnavedala">✍</a>)</small>
Original: 16 November 2012<br>Simplified: 19 April 2015
<span class="int-own-work" lang="en">Own work</span>