Medtronic, Inc.

Joel E Sivula

Wesley A Santa

Jalpa S Shah

Christopher M Arnett

Robert W Hocken, Jr

Robert A Betzold

Robert Hocken

Robert W Hocken

Techniques are described for magnetic field detection using a plurality of Hall sensors and chopper-amplifier circuit. Determination that a magnetic field is present from measurement from one of the Hall sensors may trigger confirmation or confirmation and reconfirmation of the presence of the magnetic field from measurements from one or more of the other Hall sensors.

Hall sensor circuit for magnetic field detection in implantable medical device

A hardware based block moving controller of an active device such as an implantable medical device that provides electrical stimulation reads a parameter data from a block of memory and then writes the parameter data to a designated register set of a component that performs an active function. The block of memory may include data that specifies a size of the block of memory to be moved to the register set. The block of memory may also include data that indicates a number of triggers to skip before moving a next block of memory to the register set. A trigger that causes the block moving controller to move the data from the block of memory to the register set may be generated in various ways such as through operation of the component having the register set or by a separate timer.

Methods and devices that utilize hardware to move blocks of operating parameter data from memory to a register set

A hardware based block moving controller of an active device such as an implantable medical device that provides electrical stimulation reads a parameter data from a block of memory and then writes the parameter data to a designated register set of a component that performs an active function. The block of memory may include data that specifies a size of the block of memory to be moved to the register set. Multiple individual block mover components of the controller may move respective blocks, each responsive to a dedicated trigger or to a same trigger. Furthermore, a given block mover or individual block mover component may have multiple selectable triggers. The block moving hardware based controller may have one or more memory devices to access, and the firmware may write to one memory while the block moving hardware based controller may read from another.

A cardiac pacemaker system of the type including a sensor responsive to the metabolic demand for oxygen and which varies the pacing rate in response to the output of the sensor. The pacemaker defines a function relating sensor output to pacing rate, based upon independently selectable parameters, including a first rate which may be the lower rate of the pacemaker, a second rate which may also be the upper rate of the pacemaker, and a predetermined activity level. The function defined by the pacemaker varies the pacing rate between the first and second rates, with the second rate being achieved at the selected sensor output. The pacemaker system provides both simplicity and extraordinary flexibility, allowing rate responses to be optimized to the needs of a individual patients.

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White Bear Lake, MN, United States of America

Joel E Sivula