Diodes and Bipolar Junction Transistors (BJTs) - Measuring the Temperature Coefficient

RE: Diodes and Bipolar Junction Transistors (BJTs) - Measuring the Temperature Coefficient

jc2048 — Sun, 07 Oct 2018 23:18:54 GMT

Good and useful stuff.

I've had a look at a few more books and later ones did start to use "approximately -2mV/C", so what I wrote was slightly misleading (not deliberately, obviously).

It might just be worth pointing out this is for silicon. Germanium, gallium nitride, and the various compound semiconductors used for LEDs may well be different.

http://www.ti.com/ww/en/bobpease/assets/www-national-com_rap.pdf

Page 113 "What's All This VBE Stuff, Anyhow?" is very good on temperature.

Page 62 "What's All This Box Stuff, Anyhow?" is relevant too.

RE: Diodes and Bipolar Junction Transistors (BJTs) - Measuring the Temperature Coefficient

DAB — Sun, 07 Oct 2018 18:20:31 GMT

Very good experiment and data results.

I agree, you need to look at multiple devices over different production run lots to see how consistent the manufacturing process is for these devices.

DAB

RE: Diodes and Bipolar Junction Transistors (BJTs) - Measuring the Temperature Coefficient

fmilburn — Sat, 06 Oct 2018 20:50:38 GMT

Nicely done and great write up!

RE: Diodes and Bipolar Junction Transistors (BJTs) - Measuring the Temperature Coefficient

14rhb — Sat, 06 Oct 2018 19:37:40 GMT

Hi Shabaz,

Proper experimentation and some squared graph paper as well. Top work, this is all really usefull :-)

Rod