Gateway Engineering Coalition Home Page    Semiconductor Devices and Integrated Circuit Thermal Sensors


Semiconductor junction diodes have thermal sensing properties, which can be expressed by the following equations:


I = I0(eqV/kT -1)


I0 = T3/2e-qVg/kT


where k is Boltzmannās constant, I is current, T is temperature, V is voltage and q is a constant.


Diodes, transistors and integrated circuits made of silicon or germanium can be used as thermal sensors over the range of -40 to 150 C. Output signals can be in the form of either current or voltage. Integrated circuit thermal sensors have the advantage of not needing any additional interfaces and can be connected directly to signal processing circuits.


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Support for the development of this module was provided by the National Science Foundation and The Cooper Union for the Advancement of Science and Art.

Please send questions or comments to Professor Ron Adrezin or Professor Daniel Raichel.