Optically isolated shock circuit for implantable defibrillator

Details Optically isolated shock circuit for implantable defibrillator Optically isolated shock circuit for implantable defibrillator

1994-10-11

1997-05-06

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 7, A61N 139

Patent

active

056266197

ABSTRACT:
A defibrillator output circuit utilizes an optically coupled signal for controlling an isolated electronic switch. Variants of the output circuit include coupling via phototransistors or photodiodes for the control of at least one electronic switch. An H-bridge circuit configuration with four switches is connected to a single energy storage capacitor for generating multiphasic shocks across a load. The polarity of the shocks is selectable. Optical coupling methods are employed for driving the high side switches in the H-bridge.

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