Thermistor Controlled Current Source Versatile Temperature Sensor.
Patent, Filed 7 Oct 92, patented 19 Oct 93,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An uncomplicated and reliable temperature sensor has a pair thermistors coupled in parallel with a current source that is connected in series with a load resistor. Temperature variations cause a robust current output change that generates a corresponding robust output voltage determined by a proper selection of the load resistor. Increased sensitivity is provided by the robust current to avoid many of the problems otherwise associated with D.C. amplifiers e.g., drift.
- Electrical and Electronic Equipment