Inductive Coupling Circuit Crosstalk Cancellation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Crosstalk occurs due to magnetic field leakage between closely proximate communications channels in systems using inductive coupling for chip-to-chip communications, particularly when multiple channels are stacked in close proximity, leading to interference issues.
Innovation Solution
The electronic circuit design includes strategically positioning transmitter and receiver coils on substrates to counterbalance positive and negative crosstalk based on distance, with channels nearest to each other operating in different phases and those next nearest operating in the same phase, minimizing crosstalk by optimizing coil placement and phase alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple communications channels are juxtaposed in close proximity to increase communication capacity, then the communication capacity between chips is improved, but crosstalk occurs due to magnetic field leakage between channels
Solution Approach 1:
The patent applies local quality by positioning transmitter and receiver coils at specific locations where positive and negative crosstalk from adjacent channels counterbalance each other. Each coil pair is strategically placed to exploit local magnetic field characteristics, creating null points for crosstalk cancellation while maintaining strong signal coupling for communication.
Solution Approach 2:
The patent converts the harmful magnetic field leakage that causes crosstalk into a beneficial effect by positioning coils where the leaked magnetic fields from adjacent channels naturally counterbalance. The harmful electromagnetic interference is transformed into a crosstalk cancellation mechanism, where the same magnetic field leakage that would normally cause interference instead helps reduce net crosstalk at strategically chosen positions.
2Reliability
If transmitter and receiver coils are positioned closer together to improve coupling efficiency, then the inductive coupling is improved, but crosstalk from adjacent channels increases
Solution Approach 1:
The patent resolves this contradiction by applying local quality through strategic positioning of coil pairs at specific locations on the substrate. Each position is carefully selected to achieve optimal local coupling efficiency while simultaneously exploiting the local magnetic field environment where crosstalk from adjacent channels counterbalances. This localized optimization allows close coil placement without proportionally increasing crosstalk.
Solution Approach 2:
The patent applies parameter changes by varying the positions, orientations, and dimensions of transmitter and receiver coils across different locations on the substrate. By adjusting these geometric parameters locally, the system achieves different coupling efficiencies and crosstalk characteristics at different positions, enabling optimization of each channel pair independently while maintaining overall system performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces crosstalk to negligible levels, allowing multiple communications channels to be closely juxtaposed without significant interference, enhancing communication capacity and quality between substrates.
Implementation Method 1
communications channels by being inductively coupled to the first coils
Implementation Method 2
crosstalk will be brought about, resulting from leakage of magnetic lines of force between proximal communications channels
Data Source
AI summary
An electronic circuit capable of reducing crosstalk to such a degree that the crosstalk can be substantially disregarded even where a plurality of communications channels are juxtaposed in close proximity to each other when achieving communications between substrates by inductive coupling. The transmitter coils 11 are placed on a lower chip and the receiver coils 12 are placed on an upper chip, and where it is assumed that the distance between the chips is X, and the distance between the communications channels is Y (that is, the horizontal distance between the coil centers), there exists a position, where the magnetic flux density in the receiver coils 12 resulting from the transmitter coils 11 becomes zero (0), at a predetermined Yo. That is, because large crosstalk occurs when Y is small, and small crosstalk of an inverted symbol occurs when Y is large, in the meantime, there will exist a position, where the value obtained by integrating the magnetic flux density B in the receiver coils 12 becomes zero (0), without fail. No crosstalk is theoretically generated at the position.