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magnetotransistors (Read 4853 times)
HdrChopper
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magnetotransistors
Dec 30th, 2011, 10:50am
 
Hello all,

I was lately interested in magnetotransistor (MT) technology as an alternative to integrated vertical hall plates for detecting magnetic field, and noticed literature was slowly diminishing in the last years compared to what was investigated about 10-15 years ago.
I know hall plates technology is cheaper and most commercial products use them, but I was wondering if anybody knows the actual reasons behind the failure of MTs as a commercial technology, if that statement is true (at least I do not know of any commercial magnetic sensor using MTs). In case what I'm suggesting is not true, is there any new (less than 10 years old) publications showing some progress on the field?

Any documentation you can point me to will be highly appreciated.
Many thanks

Tosei
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loose-electron
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Re: magnetotransistors
Reply #1 - Jan 6th, 2012, 1:50pm
 
Drop a inquiry to the CMRR at UCSD

http://cmrr.ucsd.edu/

Neal or Jack should be able to answer your question.
I've been away from this area since 1993 so my info is out of date.
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Jerry Twomey
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Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical
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HdrChopper
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Re: magnetotransistors
Reply #2 - Jan 9th, 2012, 5:17am
 
Excellent tip, Jerry.
Thanks much.
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loose-electron
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Re: magnetotransistors
Reply #3 - Jan 10th, 2012, 3:51pm
 
Not a problem, I did stuff for disk drives
from about 1980 to 1993 so I used
to know a lot about the subject.

These days the topic has changed a lot so its best
to ask somebody in the area doing research.

Hey! I'm Outdated!

Cheesy Grin Tongue
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Jerry Twomey
www.effectiveelectrons.com
Read My Electronic Design Column Here
Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical
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RFICDUDE
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Re: magnetotransistors
Reply #4 - Jan 22nd, 2012, 12:23pm
 
Jerry,

Unfortunately, Jack Wolf past away last year. I took a digcom class from him when I was out that way. He was a good teacher and researcher.

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