Position: Index > Switch Circuit >

Over-Temperature Switch

2015-10-18 11:35  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


The output goes high when a preset temperature is exceeded. A fixed half-supply reference voltage feeds a reference
Over-Temperature Switch

current to the inverting input, and a variable current is fed to the noninverting input. Resistor R6 is a negative-temperature-coefficient (NTC) thermistor, so the potential at the junction of R5 and R6 rises with temperature. The op amp will switch high when that voltage exceeds the half-supply value. The trip temperature can be preset via R5.



Reprinted Url Of This Article:
http://www.next.gr/meter-counter/thermometer-circuits/over-temperature-switch-l14451.html