NFC Tag Time-Control Circuit for Constant-Period Data Acquisition
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Solution Overview
Problem
Existing NFC systems in mobile phones face challenges in accurately controlling time period values for data acquisition due to variable time values in each cycle, leading to inaccurate timing control and increased weight and cost with larger memory requirements.
Innovation Solution
Implementing a time control circuit in the NFC tag that generates ticks at a constant rate to manage time periods, ensuring accurate data acquisition by synchronizing operations with a predetermined time period value, and using an integrator and comparator to compensate for signal deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a time control circuit is implemented in the NFC tag to achieve accurate timing control, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The NFC tag autonomously generates timing signals using its own internal time control circuit, clock signal generator, and counter. The tag independently controls the sampling rate and timing without requiring external timing control from the transceiver, making the system self-sufficient and improving measurement precision while avoiding the complexity of external timing control mechanisms
Solution Approach 2:
The patent replaces software-based timing control with a hardware-based time control circuit that uses a clock signal generator and counter to generate precise timing signals. This hardware substitution eliminates the inaccuracies of software timing while maintaining manageable device complexity through integrated circuit design
2Ease of operation
If software-based timing control is used in mobile phones, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent replaces software-based timing control with a hardware-based time control circuit that uses a clock signal generator and counter to generate precise timing signals. This hardware substitution eliminates the inaccuracies of software timing while maintaining ease of operation through automatic timing generation
Solution Approach 2:
The NFC tag autonomously generates timing signals using its own internal time control circuit, clock signal generator, and counter. The tag independently controls the sampling rate and timing without requiring external timing control from the transceiver, making the system self-sufficient and improving measurement precision while avoiding the complexity of external timing control mechanisms
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
Achieves accurate control of sampling rates, reduces tag cost and size, and enhances data processing efficiency while maintaining consistent operation timing.
Implementation Method 1
NFC (Near Field Communication) system is a wireless near field communication using electromagnetic wave in the frequency range of 13.56 MHz
Data Source
AI summary
The present invention involves a method and apparatus for sustaining a constant time period value for operation and answering by a tag for an NFC transceiver using a time control circuit in the tag for controlling signal transmission between the tag and the transceiver to be in accordance with the predetermined time period. In this regard, the first activation of the time control circuit is based on an instruction obtained from the NFC transceiver. Then, the transceiver waits for one or more answer values until the time control circuit generates a tick and the tag sends first answering to the transceiver. Then, the tag restarts constant time period operation after the tick. In time duration before the next tick, the transceiver starts releasing the next instruction to the tag. Such process proceeds until the transceiver obtains amount of predetermined data.