| Silicon Bandgap Temperature Sensor |
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: where T V V K q n By comparing the bandgap voltages at two different currents, ''IC''1 and ''IC''2, many of the variables in the above equation can be eliminated, resulting in the relationship: : An electronic circuit, such as the Brokaw Bandgap Reference , that measures Δ''V''''BE'' can therefore be used to calculate the temperature of the diode. The result remains valid up to about 200 °C to 250 °C, when leakage currents become large enough to corrupt the measurement. Above these temperatures, materials such as Silicon Carbide can be used instead of silicon. |
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