Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1993-06-17
1995-03-07
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 139
Patent
active
053953940
ABSTRACT:
A solid state relay, suitable for use in a defibrillator or other high voltage application, is disclosed. Upon activation by a switch, the solid state relay switches power from a high voltage power source, such as a capacitor, to a load, such as a patient undergoing defibrillation. The solid state relay has a group of at least two relay sections that share the voltage load such that no one relay section experiences an overvoltage condition due to the parametric variations of each relay section. Each relay section contains a subsection responsible for balancing the off-state voltage between the relay sections, a subsection responsible for controlling the change of voltage over time as the switch is activated, and a subsection for controlling the change of voltage over time as the switch is deactivated. The solid state relay also contains an output section responsible for minimizing the leakage current from the relay group to the load. The switch is optically coupled to the relay group to provide an isolation boundary.
REFERENCES:
patent: 3782389 (1974-01-01), Bell
patent: 4754176 (1988-06-01), Jones et al.
patent: 5097830 (1992-03-01), Eikefjord
patent: 5222492 (1993-06-01), Morgan et al.
patent: 5285779 (1994-02-01), Cameron et al.
Getzow Scott M.
Hewlett-Packard Corporation
Kamm William E.
Rose Curtis G.
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