Differential NFC Circuit Layout for Interference-Resistant Module Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing near-field communication circuits in single-ended mode suffer from poor interference resistance and are limited to sharing modules, necessitating improved interference resistance and module sharing capabilities.
Innovation Solution
The near-field communication circuit is designed in a differential mode with components such as a near-field communication integrated chip, filter, impedance adjustment circuit, and antenna fabricated on separate substrates, utilizing coaxial lines for connections, allowing for improved interference resistance and module sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If near-field communication circuits are designed in single-ended mode with shared modules, then device complexity is reduced, but interference resistance deteriorates
Solution Approach 1:
The patent divides the near-field communication circuit into separate differential signal paths with independent impedance adjustment circuits and filtering components on each substrate, segmenting the signal transmission to reduce mutual interference while maintaining module sharing capabilities through standardized interfaces
Solution Approach 2:
The patent transforms the single-ended mode to differential mode, changing the signal transmission parameters to improve noise immunity and interference resistance while maintaining compatibility with existing modular architectures through impedance matching networks
2Device complexity
If components are fabricated on the same printed circuit board, then device complexity is reduced, but harmful factors increase due to signal interference
Solution Approach 1:
The patent distributes components across multiple substrates in a three-dimensional arrangement rather than planar integration, using vertical stacking and layered coaxial connections to reduce signal interference while maintaining compact form factor and integration level
Solution Approach 2:
The patent introduces coaxial transmission lines as intermediary elements between substrates, providing shielded signal paths that reduce electromagnetic interference while maintaining compact integration, and uses filtering circuits as mediators to eliminate harmful frequency components
Data Source
AI summary
The present invention provides a communication system, an electronic device, and a near-field communication circuit in a differential mode, including a first substrate and a second substrate. The first substrate includes a near-field communication integrated chip and a filter connected to the near-field communication integrated chip; and the second substrate includes an impedance adjustment circuit connected to the filter via a coaxial line and a near-field communication antenna circuit connected to the impedance adjustment circuit. Thus, the near-field communication integrated chip on the first substrate can be shared and works with different antenna circuits and impedance adjustment circuits.