VCO driven flyback converter for implantable cardoverter/defibri

Details VCO driven flyback converter for implantable cardoverter/defibri VCO driven flyback converter for implantable cardoverter/defibri

1992-01-15

1993-11-30

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 139

Patent

active

052655881

ABSTRACT:
A battery powered cardioverter or defibrillator employing output capacitors for delivery of cardioversion or defibrillation pulses. The capacitors are charged by means of a step-up transformer, coupled and uncoupled from the battery by means of a voltage controlled oscillator which varies its off and on times as a function of the voltage on the battery and the voltage stored on the output capacitor to allow for rapid charging of the capacitor even under conditions of battery depletion. The voltage controlled oscillator is constructed to provide a highly accurate timing signal with a low current drain.

REFERENCES:
patent: 4548209 (1985-10-01), Weilders
patent: 4800883 (1989-01-01), Winstrom
patent: 4830006 (1989-05-01), Haluska

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