RF IC On-Chip Testing Without External Instruments
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Solution Overview
Problem
The complexity of testing integrated RF circuits in semiconductor devices leads to high costs and time requirements, as traditional methods rely on expensive automatic test equipment (ATE) and are unable to perform on-chip testing for stand-alone RF or analog ICs without digital signal processors.
Innovation Solution
An integrated circuit (IC) with an RF transmitter and receiver, along with a module circuitry that generates and analyzes RF signals, allowing for on-chip RF testing without the need for external RF instruments, by using a test signal generator and analyzer to determine test results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional automatic test equipment (ATE) with RF instruments is used for RF circuit testing, then measurement precision and reliability are improved, but device complexity and cost increase
Solution Approach 1:
The RF transmitter and RF receiver perform self-testing by generating and analyzing RF signals internally. The transmitter generates an RF signal that is looped back to the receiver, which then measures and reports the outgoing signal characteristics. This self-service mechanism eliminates the need for external expensive ATE with RF instruments, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The integrated circuit combines multiple functions including RF transmission, RF reception, signal generation, and test analysis within a single chip. The RF transmitter and RF receiver serve both operational purposes and testing purposes, allowing the same hardware to perform both communication functions and self-diagnosis, thereby reducing the need for separate dedicated test equipment.
2Reliability
If traditional automatic test equipment (ATE) is used for RF circuit testing, then test reliability is improved, but cost and time consumption increase
Solution Approach 1:
The RF transmitter and RF receiver are pre-configured with the capability to generate and analyze test signals. The system performs preliminary self-testing by internally generating RF signals and measuring their characteristics before actual operation, ensuring reliability is established in advance without requiring time-consuming external testing procedures.
Solution Approach 2:
The integrated circuit performs its own testing autonomously without requiring external ATE intervention. The RF transmitter generates test signals and the RF receiver analyzes them, providing reliable test results instantly. This self-service capability eliminates the time required for setup, execution, and analysis by external expensive test equipment.
3Device complexity
If stand-alone RF or analog IC without DSP is used, then device complexity is reduced, but ability to perform on-chip RF testing is lost
Solution Approach 1:
The stand-alone RF or analog IC is designed with universal functionality that allows it to perform both its primary communication functions and self-testing functions. The RF transmitter and RF receiver are configured to operate in both normal operation mode and test mode, enabling the simple IC structure to gain on-chip testing capability without adding digital components or increasing complexity.
Solution Approach 2:
The simplified IC structure achieves on-chip testing capability through self-service mechanisms where the RF transmitter and RF receiver work together to generate and analyze test signals internally. This approach allows the analog or RF-only IC to perform self-diagnosis without requiring a digital signal processor, maintaining structural simplicity while gaining testing versatility.
Data Source
AI summary
An integrated circuit (IC) is provided. The IC includes an RF transmitter and an RF receiver. The RF transmitter is configured to generate an RF signal in response to an analog test signal from a test signal generator of a module circuitry that is external to the IC. The RF receiver is configured to generate an outgoing signal according to an input RF signal, and to report the outgoing signal to the module circuitry. The module circuitry performs a test analysis on the RF signal generated by the RF transmitter or on the outgoing signal generated by the RF receiver to determine a test result. The test result is reported to a test equipment having no RF instruments.