Decoupling loop for reducing undesired magnetic coupling between inductors, and related methods and devices
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United States of America Patent
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Mar 6, 2018
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app pub date -
Mar 18, 2016
filing date -
Mar 19, 2015
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Abstract
Devices and related methods use a decoupling loop near closely spaced inductors that couples to each inductor and adds an additional coupling path between them, canceling the effects of the direct coupling between the inductors. When two inductors are close enough that undesired magnetic coupling between the inductors is possible, a decoupling loop adjacent the inductors is added that is configured to cancel the undesired magnetic coupling between the inductors. The decoupling loop is positioned, with respect to the first and second inductors, such that coupling between the decoupling loop and the first inductor induces a decoupling loop current around the decoupling loop and induces a second induced current on the second inductor that is equal and in an opposite direction to a first induced current on the second inductor caused by the first inductor. The undesired magnetic coupling between the conductors is reduced, and may even be totally cancelled.
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