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for a given current and temperature range, if you raise the temperature, voltage will be lower as a consequence.
usually you have ~-2mV/K, this is common in semiconductors (ie you will have the same behaviour for diodes).
For example, consider a transistor which drains 2mA and its output voltage is 200mV: if you increase its internal (junction) temperature by 2 kelvin degrees and keep its current to 2mA, output voltage will drop to 196mV.
this is due to thermal excitation, which conveys more energy in the crystal lattice, so that the number of free carriers increases.
for higher temperatures, some other effects arise and temperature coefficient will become positive.
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What is the difference between positive and negative temperature coefficient of resistance?
Negative temperature coefficient of resistance means that as the temperature of a piece of wire or a strip of semiconducting material increases, the electrical resistance of that material decreases.
What type tempcoefficient does the zener diode have?
negative tempareture It depends on the reverse voltage. Up to about 5.6 volts, the zener has a negative temperature coefficient. Beyond 5.6 volts it begins to show a positive temperature coefficient.
What type of temperature coefficient does the Avalanche breakdown has?
negative temperature coeeficient
Does carbon have a nearly zero temperature coefficient of resistance?
Yes, carbon has a negative temperature coefficient. -0.5*10^3/C
What is the relationship between resistance and temperature?
• ntc 'negative temperature coefficient': its resistance decreases as the temperature increases• ptc 'positive temperature coefficient': its resistance increases as the temperature increases
