Nonlinear variation of thermistor

The nonlinear change of the thermistor is very simple, because once the ambient temperature exceeds the standard, the resistance value of the thermistor made of special materials can become very large immediately under the circuit voltage detection. This characteristic thermistor can be used in open circuit protection and has a very good protection for precious instruments in the circuit.

Generally, in large instruments, there are many protection circuits. There are various small circuits on the circuit board. There are many small circuits inside. Each circuit has its own unique functions. Many small circuits are also used exclusively. For the protection of the circuit breaker, people have already considered where to use the protection circuit when designing the circuit. Generally, there is a protection circuit near the access point of the instrument connected to the circuit, which is equivalent to the safety device in the ordinary circuit.

This kind of non-linearly changing thermistor exists in the protective circuit. When the current suddenly increases or decreases, the current heating function of the thermistor changes abruptly, resulting in a sudden increase in the resistance value. The loop after the sudden increase in the resistance value is equivalent to the open circuit, and the instrument in the open circuit is the oscillating circuit that has been detached before the oscillating current does not affect itself.

Therefore, the practical significance of the manufacture of this thermistor is very important. With the rapid development of technology, people have also created a thermistor with negative properties according to the material properties. Its characteristics are manifested in its own resistance value with temperature rise. High and low, this feature is often used in fire detection circuits. Once the surrounding fire is on, when the flame burns to the thermistor exposed in the circuit, the resistance is reduced, the loop can be turned on, and the notification signal device is activated. A fire can be found.