Method and apparatus for maintaining a high voltage capacitor in

Details Method and apparatus for maintaining a high voltage capacitor in Method and apparatus for maintaining a high voltage capacitor in

1998-06-08

2000-08-01

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 137

Patent

active

060960620

ABSTRACT:
An implantable cardiac device incorporating a processor and a waveform generation circuit incorporating a high voltage capacitor wherein the processor is adapted to charge the capacitor to an initial voltage, less than the peak voltage, and then measure the leakage current occurring across the capacitor at the initial voltage. If the leakage current occurring across the capacitor at the initial voltage is less than a preselected value, selected so that the corresponding leakage current across the capacitor when the capacitor is charged to the peak voltage is within an acceptable tolerance range, the processor then does not perform any further reforming of the capacitor. Alternatively, if the leakage current across the capacitor at the initial voltage is greater than the preselected value, even the processor is adapted to charge the capacitor to a higher voltage, such as the peak voltage, and retain the capacitor at the higher voltage so that the capacitor may be reformed as a result of the application of the higher voltage.

REFERENCES:
patent: 5113862 (1992-05-01), Mortazavi
patent: 5414475 (1995-05-01), Trzyna et al.
patent: 5499156 (1996-03-01), Bentley
patent: 5684426 (1997-11-01), De Doncker
patent: 5741307 (1998-04-01), Kroll
patent: 5792188 (1998-08-01), Starkweather et al.

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