Detector for electromagnetic fields
AssigneeBiotronik CRM Patent AG
InventorThomas Doerr
Life of this patent
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Abstract
A battery-powered electrical device is disclosed, which may be implemented as an implantable medical device, wherein the device contains at least one battery voltage monitoring unit which is designed to monitor a voltage profile at a battery during the charging of a capacitor, via a transformer in a charging circuit, and which on the basis of the voltage characteristic is able to specify a magnetic presaturation of the transformer, and one control unit which terminates the charging process whenever a predefined threshold value for the magnetic presaturation of the transformer is exceeded.
Claims13
A battery-powered electrical device, comprising:
- a battery voltage monitoring unit configured to
- monitor a voltage profile at a battery during charging of a capacitor, via a transformer in a charging circuit, and
- specify a magnetic presaturation of the transformer based on the voltage profile;
- and
- a control unit configured to terminate charging of the capacitor whenever a predefined threshold value of the magnetic presaturation of the transformer is reached or exceeded;
- wherein the device is configured to be placed in an MRI-safe state by programming;
- and
- wherein the control unit is further configured to place the battery-powered electrical device in the MRI-safe state for a prescribed period of time.
Dependencies are inferred from the claim text.