RFID Pass-Through Tag Using Volatile Buffers for Direct Transfer
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Solution Overview
Problem
The limitation of memory space in non-volatile memory of existing pass-through devices restricts the flexibility and range of applications, increasing complexity and cost.
Innovation Solution
A buffer management circuit manages read and write operations in volatile memory buffers, allowing direct data transfer without relying on non-volatile memory storage, enhancing data transfer rates and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-volatile memory is used to store payload data in existing pass-through devices, then data can be permanently stored, but memory space is limited which restricts application flexibility and range
Solution Approach 1:
The patent introduces a buffer management circuit as an intermediary between the volatile memory buffer and the non-volatile memory. This buffer management circuit enables direct data transfer from the buffer to the application device without requiring payload data to be stored in the non-volatile memory, thereby overcoming the memory space limitation while maintaining application flexibility
Solution Approach 2:
The patent extracts the payload data storage function from the non-volatile memory by using a volatile memory buffer instead. The buffer management circuit manages read and write operations in this volatile buffer, allowing data to be transferred directly without relying on the limited non-volatile memory capacity, thus resolving the contradiction between memory space and application flexibility
2Reliability
If non-volatile memory is used for storing payload data, then data persistence is achieved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the data persistence function from the non-volatile memory by using the volatile memory buffer in conjunction with the buffer management circuit. This allows the system to achieve data persistence through the coordinated operation of the buffer management circuit and the application device, rather than relying solely on the non-volatile memory, thereby reducing device complexity
Solution Approach 2:
The buffer management circuit serves multiple functions: it manages read operations from the volatile memory buffer, manages write operations to the volatile memory buffer, and enables direct data transfer to the application device. This multi-functionality reduces the need for separate dedicated circuits, thereby reducing overall device complexity while maintaining data persistence
3Productivity
If non-volatile memory is used for storing payload data, then data can be stored permanently, but the data transfer rate is limited
Solution Approach 1:
The buffer management circuit acts as an intermediary that enables high-speed data transfer from the volatile memory buffer directly to the application device without going through the non-volatile memory. This direct transfer path eliminates the bottleneck of non-volatile memory access, thereby achieving high data transfer rates without requiring additional memory space
Solution Approach 2:
The patent uses the volatile memory buffer to preliminarily store payload data before transfer to the application device. This preliminary storage in the faster volatile memory allows for rapid data access and transfer, overcoming the speed limitation of non-volatile memory while maintaining the ability to store data permanently through the buffer management circuit's coordination
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
Enables high-speed, flexible data transfer without the need for additional memory, reducing costs and complexity, and supporting a broader range of applications.
Implementation Method 1
NFC technology has been developed by an industry consortium under the name of NFC Forum and derives from RFID technology. NFC components may operate in a 'Reader' mode, a 'Card Emulation' mode and a 'Device' mode as standardized in ISO 18.092. An NFC component emits via its Near Field Communication contactless interface magnetic fields, sends data by modulating the amplitude of the magnetic field, and receives data by load modulation and inductive coupling.
Data Source
AI summary
A pass-through device is provided. The device includes a contactless RFID interface circuit that exchanges payload data with an RFID device, a wired contact interface circuit with at least two contact pins for wires to connect the pass-through device with an application device, a volatile memory for temporary storing payload data and a non-volatile memory, a buffer management circuit to manage write operations of payload data received from the contactless RFID interface circuit into at least a first buffer and a second buffer in the volatile memory and to manage read operations of payload data stored in the first buffer and second buffer to be transmitted with the wired contact interface circuit to pass the payload data through without storage of payload data in the non-volatile memory.