| 摘要 |
A system for driving a medical device includes a positive pressure source; a first electromagnetic valve connected with the positive pressure source; an negative pressure source; a second electromagnetic valve connected with the negative pressure source; and an electronic control for switching the first and second electromagnetic valves at a predetermined timing. The electronic control includes a setting circuit for setting the switching timing of the first and second electromagnetic valves to generate a setting timing signal; a switching arrangement for switching the first and second electromagnetic valves in response to the setting timing signal of the setting circuit; a memory having a plurality of operation modes for inhibiting the operation of the switching circuit at a predetermined ratio to a predetermined number of the setting timing signal; and switches for selecting one of the operation modes of the memory means. |
