Changeset 1103

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Timestamp:
05/31/01 04:29:56 (12 years ago)
Author:
mds
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minor update

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  • lm-sensors/trunk/doc/temperature-sensors

    r425 r1103  
    1 Termistor and Transistors as Temperature Sensors 
    2 ------------------------------------------------ 
     1Thermistors and Transistors as Temperature Sensors 
     2-------------------------------------------------- 
    33Temperature measuring chips that use external sensors 
    44generally are designed to use either thermistors or 
    … …  
    2020 Thermometrics has a comprehensive guide) 
    2121 
    22 NTC (negative temperature coefficient) thermistors 
    23 have a parameter B (beta), units are K (kelvin). 
     22NTC (negative temperature coefficient) thermistors decrease their 
     23resistance with an increase in temperature. 
     24They commonly have a parameter B (beta), units are K (kelvin). 
    2425B is the "material constant" of the thermistor and 
    2526is a measure of the change of resistance with respect to temperature. 
    … …  
    4748is exponentially related to temperature. 
    4849 
     50PTC (positive temperature coefficient) thermistors increase 
     51in resistance with an increase in temperature. They are not 
     52commonly used for accurate temperature sensing. 
    4953 
    5054 
    … …  
    98102W83782D/W83783S chips are exceptions, they can be 
    99103configured for either. 
     104 
     105 
     106------------------ 
     107Copyright (c) 1999, 2001 Mark D. Studebaker <mdsxyz123@yahoo.com>