Discrete Band Gap  - Page 1
Forum section: electronics / projects

author: LaserSteve
author_rank: Super Contributor
timestamp: October 27, 2015, 08:48:15 pm
content: With all the back and forth of references, I know a fellow who is a chip designer extraordinaire.I thought I'd link some of Jim Thompson's early band gap work..http://www.analog-innovations.com/SED/BandGap.pdfhttp://www.analog-innovations.com/SED/BandGap-RealSample.pdfhttp://www.analog-innovations.com/SED/BandGapExample.pdfhttp://www.analog-innovations.com/SED/CA3046-BandGap.pdfhttp://www.analog-innovations.com/SED/BandGaps_2010_09_26_SED.pdfhttp://www.analog-innovations.com/SED/DiscreteBandGap.pdfSteve

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 27, 2015, 11:43:13 pm
content: Wow

author: Yansi
author_rank: Super Contributor
timestamp: October 27, 2015, 11:47:35 pm
content: The web service is unaccessible from here. Please reupload the materials somwhere else, if you can.Thx,Y

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 27, 2015, 11:52:04 pm
content: Quote from: Yansi on October 27, 2015, 11:47:35 pmHere you go:(disclaimer that is is not mine, I don't claim copyright, etc.)

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 27, 2015, 11:59:11 pm
content: I can't upload thehttp://www.analog-innovations.com/SED/BandGap-RealSample.pdfbecause it's too large, maybe someone else can put it on a file-sharing service for archival purposes.

author: c4757p
author_rank: Super Contributor
timestamp: October 28, 2015, 12:03:07 am
content: Until then it's up here, at least temporarily:https://misc.c4757p.com/BandGap-RealSample.pdf

author: Yansi
author_rank: Super Contributor
timestamp: October 28, 2015, 01:27:00 am
content: Quote from: crispy_tofu on October 27, 2015, 11:52:04 pmThanks for the upload. Interesting stuff :-)

author: GK
author_rank: Super Contributor
timestamp: October 28, 2015, 07:59:27 am
content: Quote from: LaserSteve on October 27, 2015, 08:48:15 pmDon't know who he is (no disrespect), but I'm pretty sure the bandgap voltage reference as we currently know it originates with Paul Brokaw. I've attached his original 1974 paper:https://www.eevblog.com/forum/projects/discrete-band-gap/?action=dlattach;attach=178777I've done a real-life discrete bandgap reference, in a discrete implementation of a TL494 (which is the Brokaw configuration):TO-126's for the reference/comparison transistors bolted together to keep them thermally coupled.Schematic:https://www.eevblog.com/forum/projects/discrete-band-gap/?action=dlattach;attach=178780

author: LaserSteve
author_rank: Super Contributor
timestamp: October 28, 2015, 01:45:45 pm
content: GK wroteQuote:"Don't know who he is but I'm pretty sure the band gap originated with Paul Brokow"Endeth QuoteHe has a lot of useful spice stuff on his web page, too...I didn't say Jim invented it, but he did publish some of his designs, which is nice.He started with MC1648, MC1488, MC1489, MC1733 , MC4044 and it goes on from there.. On some of them he's a contributor, and on others he is the principle designer... Most of us on here have been within foot or two of several of his designs in our lifetime...I'm curious, if I build one of Jim's published discrete designs and put in an oven, if some one in the US can test it...Steve

author: 3roomlab
author_rank: Frequent Contributor
timestamp: October 28, 2015, 02:00:51 pm
content: would managing such a large PCB thru temp drift harder? as in it would need to be housed in a temp control box? yes?