Transponder Circuit Passive Mode Testing
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Solution Overview
Problem
Existing methods for testing transponder circuits are limited in their ability to perform comprehensive testing in a passive mode without external power sources and do not allow for secure, efficient data transmission and storage of test data.
Innovation Solution
A method and circuit for a transponder that enables testing in a passive mode using an alternating or electromagnetic field for energy supply, allowing for secure activation of a test routine, storage of memory content as test data, and transmission of this data to a base station, with features including password protection, programmable test routines, and encryption for secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If testing is performed in passive mode using field energy supply, then power consumption is reduced and external power sources are eliminated, but testing capability and data transmission reliability are limited
Solution Approach 1:
The testing process is divided into distinct phases: energy harvesting from the field during idle periods, data storage in predetermined memory areas, and controlled data transmission during designated time slots. This segmentation allows the system to maintain passive mode operation while ensuring reliable testing capability through structured operation phases.
Solution Approach 2:
Memory areas for storing test data are predetermined and prepared in advance during circuit initialization. This preliminary preparation ensures that when testing is required, the system can immediately store and transmit data without requiring additional power management complexity, thus maintaining reliability in passive mode.
2Reliability
If memory content is hidden and cannot be read out through protocol layer, then data security is improved, but test accessibility and debugging capability are reduced
Solution Approach 1:
A test routine acts as an intermediary mechanism that provides controlled access to hidden memory content. The routine is activated by specific test commands and retrieves data from protected memory areas through a defined interface, allowing testing while maintaining security during normal operation. This intermediary approach balances data protection with debugging accessibility.
3Reliability
If test routine is permanently implemented in program memory, then testing functionality is ensured, but memory flexibility and program adaptability are reduced
Solution Approach 1:
The test routine is designed as a universal, permanently implemented function in program memory that can handle multiple testing scenarios and data types. This multi-functional approach ensures reliable testing capability while the routine itself provides adaptability through configurable parameters and flexible data handling, compensating for the fixed memory implementation.
4Productivity
If data is transmitted during predetermined time intervals, then communication protocol efficiency is improved, but transmission flexibility and response time are reduced
Solution Approach 1:
Data transmission is organized into periodic time intervals dedicated to test data communication. This periodic structure improves protocol efficiency by establishing predictable communication windows, while the system maintains responsiveness by preparing data for transmission in advance during non-transmission periods, effectively managing the trade-off between structured communication and response time.
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 comprehensive testing of transponder circuits in a passive mode with reduced power consumption, secure data transmission, and efficient storage and retrieval of test data without the need for external power or physical connections, allowing for fully encapsulated and contactless testing.
Implementation Method 1
The energy from the field is converted to electrical energy and is temporarily stored in a capacitor
Data Source
AI summary
A method for testing a circuit for a transponder, and transponder circuit, is provided, in which the circuit is operated in a passive mode in that the circuit is supplied with energy from a field, in which, during the passive mode, the circuit receives a command via the field to activate a test routine, in which memory content is stored by the test routine as test data in a memory area of a memory of the circuit predetermined by the test routine, in which, during the passive mode, the test data are transmitted via the field.