| 摘要 |
PURPOSE:To shorten an open time of the circuit by quickly cutting off and controlling a driving current which is supplied to the first and second current supply parts, by means of a switch, in the current inversion type pay station charging pulse send- out circuit. CONSTITUTION:When it is desired to quickly cut off the charging pulse send-out circuit consisting of current supply circuits 300, 400, driving of the current supply circuits 300, 400 is stopped quickly by setting the control terminals 50, 60 for controlling the switch parts 310, 410, to a high level, and short-circuiting the outputs of the charging pulse send-out driving parts 320, 420 by means of the switch parts 310, 410. Accordingly, an effective holding time at the time of release is shortened, and the circuit utilization rate of the whole system can be elevated. |
