RFID Receiver Bit Extraction With Direct ADC Antenna Interface
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Solution Overview
Problem
The implementation of RFID receivers and transceivers in portable devices, such as smartphones and smart watches, is hindered by the size, weight, and inflexibility of electronic components, which are not easily updated due to labor and cost constraints, leading to a mismatch with the shorter life cycles of these devices.
Innovation Solution
An RFID receiver design that integrates a decoder circuit with an analog-to-digital converter directly connected to the antenna, eliminating external signal processing components and allowing for flexible updates through computer program code, enabling efficient extraction of data bits from radio signals without the need for diodes or transistors, and incorporating filters and sub-sampling modules for improved tolerance to frequency and amplitude fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional RFID receivers use external electronic components (diodes, transistors) for signal processing, then signal processing functionality is achieved, but device size and weight increase
Solution Approach 1:
The patent combines the analog-to-digital converter and decoder circuit into a single integrated component that can be directly connected to the antenna. This merging eliminates the need for separate external components like diodes and transistors, thereby reducing device weight while maintaining signal processing functionality.
Solution Approach 2:
The integrated decoder circuit performs multiple functions including analog-to-digital conversion, signal demodulation, and data bit extraction within a single component. This multi-functionality reduces the overall component count and device weight while preserving all necessary signal processing capabilities.
2Adaptability or versatility
If RFID receiver hardware components are changed to improve functionality, then performance is enhanced, but labor cost and complexity increase
Solution Approach 1:
The patent implements a dynamic update mechanism where the decoder circuit can be reconfigured or updated through software/firmware changes rather than requiring physical hardware replacement. This allows functionality improvements to be deployed easily without incurring high labor costs for component changes.
Solution Approach 2:
The patent uses a standardized integrated decoder circuit design that can be replicated across different device models. This copying approach allows for easy updates by replacing the entire integrated component rather than modifying individual external components, reducing update complexity and labor cost.
3Reliability
If more electronic components are used for signal processing, then signal processing capability is improved, but device size increases
Solution Approach 1:
The patent merges multiple signal processing functions (analog-to-digital conversion, demodulation, bit extraction) into a single integrated decoder circuit that connects directly to the antenna. This consolidation maintains comprehensive signal processing capability while minimizing the physical area occupied by electronic components.
Solution Approach 2:
The integrated decoder circuit contains nested functional modules where the analog-to-digital converter is integrated within the decoder circuit, which itself is connected to the antenna system. This nesting arrangement optimizes space utilization while preserving all necessary signal processing capabilities.
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 solution reduces the electronic component count, enhances tolerance to signal fluctuations, and allows for flexible updates of the RFID receiver's functionality, addressing the size, weight, and update challenges while maintaining performance in RFID applications.
Implementation Method 1
an antenna (11) configured to receive a radio signal from an RFID transmitter (2), and to generate an electrical signal from the radio signal received from the RFID transmitter (2)
Data Source
AI summary
An RFID receiver (1) comprises an antenna (11) configured to receive a radio signal (20) from an RFID transmitter (2) and to generate an electrical signal (110) from the radio signal (20) received from the RFID transmitter (2). A decoder circuit (10) is connected to the antenna (11) and configured to extract from the electrical signal (110) generated by the antenna (11) data bits encoded in the electrical signal (110). The decoder circuit (10) comprises an analog-to-digital converter (12) connected directly to the antenna (11) and configured to generate a digital input signal (13) from the electrical signal (110) generated by the antenna (11). A bit extractor (14) is connected to the analog-to-digital converter (12) and configured to extract the data bits from the digital input (13) signal generated by the analog-to-digital converter (12).