摘要 |
PURPOSE:To obtain the simpler circuit and functional versatility by connecting a high-breakdown-voltage large-current switching transistor in series to a electric discharge tube. CONSTITUTION:The B terminal B of a trigger coil is directly connected to the main current circuit of a high-breakdown-voltage large-current switching transistor for switching regulator, etc. As a result of this, the circuit is simplified as compared to the conventional ones which have hitherto connected a control element main thyristor of large instantaneous permissible current and dielectric strength in series to the discharge tube and performed controlling of light emission and stopping by the synchronizing operation of the auxiliary control element thyristor and the thyristor for reverse biasing of the main thyristor, etc. In addition, the light emission function of high versatility faithful to the relative input signal is provided only by the base control pulses of the high-breakdown-voltage large-current switching transistor. |