| 摘要 |
<p>A charge pump is provided in the same integrated circuit chip as a control means which permits selectively connecting any of one or more electrodes with conductors along a lead. The charge pump derives about two volts from a one-volt supply, and becomes stable within a few tens of microseconds. The charge pump may be composed of three doublers - the first generating timing signals for the second and third doublers, with the second and third doublers working out of phase with each other.</p> |
