| 摘要 |
A voltage is applied across the positive electrode and negative electrode of a flash discharge tube (xenon flash lamp) to emit light by a charge and discharge capacitor. This voltage application accumulates energy in a residual inductance existing in the circuit constructed by the flash discharge tube and the power supply circuit for the flash discharge tube. This energy is made to flow as surge current into a series circuit comprising the flash discharge tube, a surge current diode and a diode protecting resistor.
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