| 摘要 |
PURPOSE:To have quick rising, drive with fine current, stable operation, and AC/DC switching by providing a power supply which can be changed over between AC and DC, and accomplishing high frequency drive using a transformer equipped with a specified core. CONSTITUTION:A limit switch 12 is closed by the suspension weight of an object to which the projected light from a bactericidal lamp is irradiated, for ex. a microphone, and current from AC mains energizes an oscillator transformer 1 for low frequency having a troidal core for low frequency. This induced signal current is rectified through a transistor 2 and fed to a choke transformer 3. An AC/DC changeover switch 11 allows changing-over from AC mains to a DC power supply 13. Current from the choke transformer 3 energizes an inverter transformer 6 having ferrite core for high frequency, and this high frequency power energizes a bactericidal lamp F1, etc. Use of ferrite core quickens rising and enhances the stability because of IC circuit. |
