EEVblog No Script, No Fear, All Opinion
Demonstrating the difference between Schottky diodes and PN junction silicon diodes, and how your multimeter can influence your measurement when troubleshooting.
Answering an interesting Twitter question.
https://x.com/blind_via/status/2052223991839170919
https://www.tti.com/content/ttiinc/en/resources/blog/infographics/schottky-diodes.html
https://engineering.purdue.edu/~ee606/downloads/ECE606_f12_Lecture17.pdf
Forum: https://www.eevblog.com/forum/blog/eevblog-1746-schottky-vs-pn-diodes-measurement-traps/
00:00 – Twitter question
01:21 – Recreating the problem
03:08 – Why doesn’t it read zero volts? Let’s try a PN junction diode
04:21 – Schottky vs PN Junction diodes, they are NOT the same!
06:06 – What about a diode tester?
07:15 – Why doesn’t the Schottky diode work like a diode?
08:39 – It’s a multimeter measurement TRAP!
10:37 – A closer look at Schottky diodes
14:21 – Datasheet inspection, and advantages vs disadvantages of Schottky diodes
15:21 – Reverse leakage current, PN vs Schottky
17:16 – THREE orders of magnitude difference!
22:29 – Digital vs Analog multimeter, Analog WINS!
Podcast: Download
