Discrete Band Gap

[LaserSteve]

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.pdf

http://www.analog-innovations.com/SED/BandGap-RealSample.pdf

http://www.analog-innovations.com/SED/BandGapExample.pdf

http://www.analog-innovations.com/SED/CA3046-BandGap.pdf

http://www.analog-innovations.com/SED/BandGaps_2010_09_26_SED.pdf

http://www.analog-innovations.com/SED/DiscreteBandGap.pdf

Steve

[crispy_tofu]

Wow 

[Yansi]

The web service is unaccessible from here. Please reupload the materials somwhere else, if you can.
Thx,
Y

[crispy_tofu]

The web service is unaccessible from here. Please reupload the materials somwhere else, if you can.
Thx,
Y

Here you go:

(disclaimer that is is not mine, I don't claim copyright, etc.)

[crispy_tofu]

I can't upload the http://www.analog-innovations.com/SED/BandGap-RealSample.pdf because it's too large, maybe someone else can put it on a file-sharing service for archival purposes. 

[c4757p]

Until then it's up here, at least temporarily: https://misc.c4757p.com/BandGap-RealSample.pdf

[Yansi]

The web service is unaccessible from here. Please reupload the materials somwhere else, if you can.
Thx,
Y

Here you go:

(disclaimer that is is not mine, I don't claim copyright, etc.)

Thanks for the upload. Interesting stuff :-)

[GK]

I thought I'd link some of Jim Thompson's early band gap work..

Don'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=178777

I'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

[LaserSteve]

GK wrote
Quote:
"Don't know who he is but I'm pretty sure the band gap originated with Paul Brokow"
Endeth Quote

He 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

[3roomlab]

would managing such a large PCB thru temp drift harder? as in it would need to be housed in a temp control box? yes?