Current leakage prevention circuit for an external defibrillator
US5601610A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3912
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An external defibrillator high voltage circuit with a leakage prevention circuit. The high voltage circuit includes first and second output terminals configured for electrical interconnection to electrodes, first and second charge supply terminals configured for interconnection to a charging voltage supply, and a plurality of capacitors. Charging semiconductor switches which are responsive to charge control signals electrically interconnect the capacitors to the charge supply terminals in a parallel circuit to charge the capacitors. Discharging semiconductor switches which are responsive to discharge control signals electrically interconnect the capacitors in a series circuit between the output terminals to generate defibrillation pulses. The discharging switches include at least two switches interconnected to each other at a leakage shunting node and in a series circuit between one of the capacitors and the second output terminal. A leakage shunting switch electrically interconnects the leakage shunting node to the first output terminal when switched to a closed state to reduce leakage currents through the patient when defibrillation pulses are not being produced. Charge dump semi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.