Self-Testing Transceiver Mechanism for Bit Error Rate Analysis
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Solution Overview
Problem
The manufacturing and testing of single-chip transceivers are complex due to the extensive circuitry, requiring numerous tests and expensive external equipment, making it difficult to efficiently assess bit error rates and other receiver/transmitter performance.
Innovation Solution
A self-testing mechanism within the transceiver that includes an analog front end, demodulator, logic circuit, and storage device to perform bit error rate testing without external complex circuitry, using a test pattern and random data to generate synchronization information and count errors, allowing for minimal on-chip components and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If single-chip transceiver is used, then integration is improved, but testing complexity increases
Solution Approach 1:
The transceiver performs self-testing by generating test signals internally and measuring its own receive path performance. The transmit path generates a test tone that loops through the receive path, allowing the device to test itself without external testing equipment, thus reducing testing complexity while maintaining integration benefits
Solution Approach 2:
The transmit and receive paths are designed to serve dual purposes: normal communication functions and testing functions. The same hardware components are used for both operational modes and test modes, eliminating the need for separate dedicated test equipment and reducing overall system complexity
2Adaptability or versatility
If extensive circuitry is included in single-chip transceiver, then functionality is improved, but manufacturing and testing difficulty increases
Solution Approach 1:
The transceiver qualifies fabricated devices through self-testing mechanisms. The device uses its own extensive circuitry to generate test signals and measure performance, eliminating the need for complex external testing equipment and simplifying the manufacturing qualification process while maintaining full functionality
Solution Approach 2:
The testing mechanism changes operational parameters by switching between transmit and receive modes for testing purposes. By adjusting the operational state of existing circuitry rather than adding new components, the device can perform comprehensive tests of all functional blocks without increasing manufacturing complexity
3Reliability
If numerous tests and measurements are required, then quality assurance is improved, but testing time and cost increase
Solution Approach 1:
The device performs comprehensive quality assurance tests using its own internal resources. By generating test signals and measuring receive path performance internally, the device can complete numerous tests quickly without requiring external equipment setup time, thus maintaining high quality assurance while reducing testing time
Solution Approach 2:
The testing process maintains continuous operation by looping test signals through the receive path without interruption. The self-testing mechanism allows for continuous measurement and evaluation of performance parameters, reducing total testing time while ensuring thorough quality assurance through multiple measurement points
Data Source
AI summary
In a radio device such as a receiver or transceiver, a test operation can be performed to determine performance. A received signal can be processed to obtain demodulated samples, which can be provided to a logic to perform a logic operation on the samples to generate a logic output. A storage such as a counter or other mechanism is coupled to the logic to store a count of a number of the logic outputs having an error.