The Ebers-Moll Transistor Model - Transistors 101, episode 11

We use our simple test rig to measure how a transistor's collector current varies with the voltage between base and emitter. With the data from this test, we present the Ebers-Moll model, where the collector current is an exponential function of the base voltage. We learn why transistor beta is still a useful model, although it's incomplete. We learn to do small-signal analysis using Ebers-Moll, by applying the intinsic emitter resistance. Test rig schematic and supporting files can be found on the project GitHub: https://github.com/kennykb/kevins-cav... 00:16 Review 00:55 The Ebers-Moll model 02:53 A real transistor 04:16 Why did beta work? 06:50 What went wrong before? 07:35 Intrinsic emitter resistance 08:47 The "Gothic arch" waveform 10:18 Beware of saturation! 11:02 Summary Images: "Jewell James Ebers" https://commons.wikimedia.org/wiki/Fi... Public domain in USA "John L. Moll" courtesy of National Academy of Engineering https://www.nae.edu/28866/Dr-John-L-Moll "silence" © 2013 Rebecca Barray https://www.flickr.com/photos/rebecca... CC-BY-NC-SA https://creativecommons.org/licenses/... "Men fight" OpenClipArt user 'j4p4n' https://openclipart.org/detail/318806... CC0 "Transistor Girl"   / cvbgyterrxk   © 2021 Samuele Caldini Used by permission. Music: “Light Sting” Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/b...