NFC Module Audio Jack Transformer Signal Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The cost and power supply considerations for NFC modules in devices pose challenges for effective implementation in near field communication systems, particularly in terms of efficient signal transmission and interference reduction.
Innovation Solution
The NFC system incorporates a transformer-based configuration that couples voltage and NFC signals between a smart device and an NFC device, utilizing a DC converter and capacitors to manage signal interference and power transmission, along with specific electronic switches and resistors to control signal flow, thereby enabling efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an NFC module is installed in a device, then near field communication functionality is enabled, but cost and power supply problems arise
Solution Approach 1:
The patent combines the NFC module with existing audio components (audio jack, audio codec, amplifier) to share hardware resources. The NFC module reuses the audio jack for communication and the audio codec/amplifier for signal processing, eliminating the need for separate dedicated NFC hardware and reducing overall power consumption.
Solution Approach 2:
The audio jack is designed to serve multiple functions: traditional audio output and NFC communication. The audio codec and amplifier are utilized for both audio signal processing and NFC signal modulation/demodulation, allowing a single component to perform multiple roles and reducing the total power requirement for NFC operations.
2Adaptability or versatility
If an NFC module is installed in a device, then near field communication functionality is enabled, but cost increases
Solution Approach 1:
The NFC module is integrated with existing audio components rather than being a completely separate addition. By sharing the audio jack, audio codec, and amplifier, the patent reduces the number of discrete components needed, lowering manufacturing costs and simplifying the production process.
Solution Approach 2:
Existing audio components are designed to perform both their traditional audio functions and NFC communication functions. This multi-functionality approach eliminates the need for entirely separate NFC hardware, reducing component count and manufacturing complexity while enabling NFC capability.
3Reliability
If voltage and NFC signals are transmitted through a transformer, then signal coupling is achieved, but signal interference occurs
Solution Approach 1:
The patent introduces a coupling capacitor as an intermediary component between the transformer and the NFC module. This capacitor blocks DC voltage from reaching the NFC module while allowing AC NFC signals to pass through, effectively separating the voltage transmission path from the signal path and eliminating interference.
Solution Approach 2:
The signal transmission path is divided into separate functional stages: voltage transformation through the transformer, DC blocking through the coupling capacitor, and NFC signal processing through the NFC module. This segmentation isolates different signal types and prevents them from interfering with each other.
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 effectively reduces signal interference and ensures reliable power transmission, enhancing the performance and efficiency of NFC communication between devices.
Implementation Method 1
a first transformer (21) configured to receive voltage signals and NFC signals outputted by the smart device (100), and configured to output the voltage signals to a DC converter (23) and output the NFC signals to an NFC module (22)
Implementation Method 2
a direct current (DC) converter (23) configured to receive the voltage signals outputted by the first transformer (21), and configured to convert the voltage signals into direct current (DC) signals
Implementation Method 3
a first capacitor (C1) coupled to a second terminal (2) of the first transformer (21), wherein the first capacitor (C1) is configured to block direct current (DC) and pass alternating current (AC)
Data Source
AI summary
A Near Field Communication (NFC) device includes an NFC processing chip, a voltage conversion chip, a first transformer, and a connector. The NFC processing chip receives and transmits NFC signals. The first transformer is coupled to the NFC processing chip. The connector is coupled to the NFC processing chip and the first transformer, the connector transmits the NFC signals and transmits voltage signals to the first transformer. The first transformer transmits the voltage signal to the voltage conversion chip to supply an operating voltage to the NFC processing chip and the first transformer further transmits alternating current signals to the connector. An NFC system is also provided.