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Methods and circuits used to suppress electromagnetic interference during the manipulation device

A technique of switching circuits, currents, applied in the direction of using a magnetic field generated by a coil, electrotherapy, magnetic therapy, etc.

Active Publication Date: 2018-06-29
GIVEN IMAGING LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using PWM results in a switching frequency component superimposed on the positioning signal during the positioning period

Method used

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  • Methods and circuits used to suppress electromagnetic interference during the manipulation device
  • Methods and circuits used to suppress electromagnetic interference during the manipulation device
  • Methods and circuits used to suppress electromagnetic interference during the manipulation device

Examples

Experimental program
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Embodiment Construction

[0020] The following description provides various details of exemplary embodiments. However, the description is not intended to limit the scope of the claims but to explain various principles of the invention and the manner of implementing it.

[0021] Although the embodiments of the present invention are not limited in this respect, using terms such as "processing", "calculating with a computer", "calculating", "determining", "reasoning", "deriving", "establishing", "analyzing" checking " Such terms may refer to the operations and / or processes of a computer, computing platform, computing system, or other electronic computing device that manipulates and / or transforms data representing physical (e.g., electronic) quantities within computer registers and / or memory into the same Represents computer registers and / or other data of physical quantities in memory and / or other information non-transitory storage media that can store instructions for performing operations and / or processe...

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Abstract

A switching circuit includes a first switch and a second switch respectively connecting a first terminal and a second terminal of an electrical coil to a positive terminal of a voltage source, a third switch and a fourth switch respectively connecting the first terminal and the second terminal of the electrical coil to a negative terminal of the voltage source, and a controller to control the switching circuit in a current control mode to alternate a voltage polarity of the voltage source to thereby control a magnitude and direction of the electrical current of the electrical coil, and to control the switching circuit in a current hold mode to disconnect the electrical coil from the voltage source and to short-circuit the electrical coil to maintain the magnitude and direction of the electrical current at the transition time when the switching circuit switched to the current hold mode.

Description

technical field [0001] The present invention relates generally to an in vivo positioning system, and more particularly to a method for canceling or suppressing electromagnetic interference during manipulation of a magnetic field steerable device, and a circuit for performing the electromagnetic interference canceling / suppressing method. Background technique [0002] In vivo measurement systems are known in the prior art. Some in-vivo devices / systems that traverse the gastrointestinal (GI) system may include one or more imaging sensors and / or other types of sensors for imaging (eg, capturing images of) the interior of the GI system. In vivo devices may be pushed through the GI system by peristaltic forces applied by the digestive system or by being manipulated (eg, magnetically). Some applications require knowledge of the current position and / or orientation (P&O) of the involved in vivo device. For example, in order to magnetically steer an in vivo device, eg, in a GI syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B1/00A61N2/02A61N2/10
CPCA61B1/00158A61B1/041A61B5/0031A61B5/062A61B5/073H05K9/0071
Inventor 塞米昂·海特亚伯拉罕·罗斯
Owner GIVEN IMAGING LTD