[time-nuts] Diodes as temperature sensors
alan.melia at btinternet.com
Mon Jul 21 06:51:27 EDT 2014
Simple temperature sensors use the static diode characteristic, but a more accurate method is to use the slope of the characteristic, this is independent of individual diode parameters, though requires a little it more electronics to display. There are many papers on this back in the 1960/70s.
From: Hal Murray <hmurray at megapathdsl.net>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Cc: hmurray at megapathdsl.net
Sent: Monday, 21 July 2014, 4:58
Subject: Re: [time-nuts] Diodes as temperature sensors
alw.k9si at gmail.com said:
> Apparently, the forward biased silicon diode was temperature sensitive
> enough that a small D.C. amplifier could drive a meter to read-out with
> reasonable accuracy. Well, maybe not accurate by Time-nut standards but
> close enough for its intended purpose.
I think that mechanism is widely used for silicon temperature sensors. There
is one (or more) on most modern CPU chips as well as special temperature
measuring chips such as the Maxim/Dallas DS18B20 and DS18S20.
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