| 摘要 |
A CRT (cathode-ray tube) degaussing circuit comprises: an AC (alternating current) power source; a PTC (positive temperature characteristic) resistor; a heat sense switch, provided as a single unit with the PTC resistor for controlling the current flow of the entire circuit so as to be turned on/off according to a surface temperature of the PTC resistor; and a degaussing coil for demagnetizing metallic components of the CRT when the current is applied. The AC power source, the PTC resistor, the degaussing coil, and the heat sense switch form a closed-loop circuit, and the heat sense switch is connected thereto so as to turn on/off the current flow in the closed-loop circuit.
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