Self-Testing Transceiver Architecture for Production Efficiency
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Solution Overview
Problem
Conventional transceiver production is hindered by costly and time-consuming factory testing and calibration processes, which do not scale with dimensional reductions, leading to inefficiencies and increased production costs.
Innovation Solution
A self-testing transceiver architecture that integrates a compact low-power receiver and transmitter pre-power amplifier stages with a closed-loop architecture, utilizing a local oscillator generator to enable internal testing of both receiver and transmitter portions, reducing reliance on external test equipment and allowing for digital gain control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional factory testing and calibration is used, then transceiver subsystems can be tested, but production cost and time increase significantly
Solution Approach 1:
The transceiver is designed to perform its own testing and calibration using internal components. The receiver portion tests the transmitter portion by generating test signals that are transmitted through the antenna and received back, while the transmitter portion tests the receiver portion similarly. This self-testing capability eliminates the need for external test equipment and dedicated factory testing time, thereby improving production efficiency while maintaining reliability.
Solution Approach 2:
The receiver portion is configured to perform dual functions: normal reception operations and testing of the transmitter portion. Similarly, the transmitter portion is configured for both normal transmission operations and testing of the receiver portion. This multi-functionality allows the same hardware components to serve multiple purposes, eliminating the need for separate dedicated test equipment and improving overall productivity.
2Reliability
If external test equipment is used for factory testing, then comprehensive testing can be performed, but resource requirements do not scale with dimensional reductions
Solution Approach 1:
The transceiver uses its own internal components to perform comprehensive testing without requiring external test equipment. The receiver portion generates test signals and processes them through the antenna and transmitter components, while the transmitter portion does the same for receiver testing. This self-service approach maintains testing comprehensiveness while eliminating the complexity and resource requirements of external test equipment, making the testing process scalable with dimensional reductions.
3Manufacturing precision
If conventional receiver design with high-order low-pass filter is used, then substantial gain control is provided, but circuit integration is reduced
Solution Approach 1:
The patent extracts the gain control function from the conventional high-order low-pass filter in the receiver back-end and relocates it to the transmitter pre-power amplifier stages. By implementing gain control in the transmitter portion using closed-loop architecture with feedback paths, the design achieves substantial gain control precision while improving circuit integration. This extraction allows the receiver portion to be simplified while maintaining overall system performance.
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AI summary
A self-testing transceiver comprises a receiver, and a transmitter including a power amplifier (PA) and a plurality of transmitter pre-PA stages. The plurality of transmitter pre-PA stages are configured to generate a communication signal at a receive frequency of the transceiver and the receiver is configured to process another communication signal at a transmit frequency of the transceiver, thereby enabling transceiver self-testing. A method for use by a transceiver for self-testing comprises generating a first communication signal at a transmit frequency of the transceiver by a transmitter of the transceiver, processing the first communication signal by a receiver of the transceiver, generating a second communication signal at a receive frequency of the transceiver by the transmitter, and processing the second communication signal by the receiver. The described generating and processing of the first and second communication signals resulting in self-testing by the transceiver.