| 摘要 |
<p>The present invention relates to a three-wire temperature detection and control circuit for electromagnetic shielding, which can detect variation in the temperature impedance of an NTC thermistor in a three-wire NTC thermal cable and can control temperature using the detected variation in temperature impedance. The three-wire temperature detection and control circuit is used while being connected to a heating cable (10). In the circuit, a temperature signal voltage supply adjustment unit (100) controls supply of a temperature signal voltage. A temperature detection unit (300) compares a temperature signal voltage output between the first wire and the second wire and/or between the first wire and the third wire with a reference voltage, and outputs a temperature control signal. A trigger coupling generation unit (200) generates a trigger signal and controls a trigger operation. A controlled rectifier (30) is connected to the trigger coupling generation unit.</p> |
