| 摘要 |
PURPOSE:To transmit and receive a charging completion signal and a dimming signal without malfunction by using the first and the second semiconductor switches for transmission and reception of the charging completion signal and the dimming signal on a common line and using a turn-on signal of an X contact to make the second semiconductor switch conductive. CONSTITUTION:Since the base of a transistor TR T2 is connected to the intersection between a resistance R1 and a diode D1 through a resistance R2, the charging completion signal appears on the base of the TR T2 simultaneously with appearance of the high-level charging completion signal on the common line to make the TR T2 non-conductive. Therefore, the charging completion signal on the common line is not inputted to TRs T2 and T1 but appears only in a common terminal B. After a flash light emission signal is inputted to a flash device, a discharging tube Xe emits light, and turning-on/off of the first and the second semiconductor TRs T1 and T2 is switched, and a signal for dimming indication is generated simultaneously. |
