| 摘要 |
A regulated current high voltage source for use in driving an iontophoresis probe. The source provides a highly regulated current to the iontophoresis probe up through voltages substantially in excess of a kilovolt in order to maintain the probe ion injection rate under conditions of partial probe blockage. The source employs a DC-to-DC inverter, comprising a blocking oscillator and pulse transformer, with the load provided in the output circuit of the transformer in a feedback arrangement to a regulating amplifier and driver circuit for the DC input to the pulse transformer and blocking oscillator. A separate timing oscillator having a period of several seconds is optionally employed to disable the source and eliminate the high voltage output in order to generate intermittent ion injection. |
