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US 4,301,804 AGranted
Pacemaker with Hall effect externally controlled switch
AssigneeMedtronic, Inc.
InventorsDavid L. Thompson, Stephen R. Duggan, Glenn M. Roline
Life of this patent
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Abstract
A body implantable cardiac pacemaker having a Hall effect switch which may be activated by a magnetic field in order to alter one or more pacemaker characteristics. A circuit in the pacemaker produces a strobe signal which is used to turn on a current flow through the Hall effect element once each pacemaker pulse cycle for a period of 25.mu. sec. The Hall effect element is part of an integrated circuit and is oriented in a plane parallel to the broad plane of the pacemaker.
Claims8
A body-implantable pulse generator for providing stimulating pulses to living tissue, comprising:
- means for generating said stimulating pulses;
- a semiconductor;
- means for causing an electrical current flow through said semiconductor;
- means for detecting a voltage produced in said semiconductor in a direction perpendicular to the direction of said current flow;
- and
- means responsive to said means for detecting for controlling said means for generating in response to an externally applied magnetic field.
3 more elements
Dependencies are inferred from the claim text.