My goal is to heat a thermistor as rapidly as possible.
The thermistor has a resistance value of 10k Ohms at 25 degrees C, and a negative temperature coefficient.
If I apply a constant voltage of 12V, the thermistor requires 30-50 seconds to heat up by 5-10 deg C above its starting temp. I would like the thermistor to reach 5-10 deg C above its start temp in less than 3 seconds, preferably within 1 second.
I am using a power source that can provide up to 30V, with a max draw of 3A.
I am considering using a constant-current source to try to achieve this goal, such as http://www.instructables.com/id/Constant-Current-Source-with-Operational-Amplifier/, but modified to provide greater current than the example project. Will this work toward my goal? Or are there better circuit options I could consider?