Memory Clock Signal Tolerance Test System
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Solution Overview
Problem
Current clock signal tolerance tests for memories result in large errors, preventing the accurate determination of actual performance parameters.
Innovation Solution
A test system and method that provide a to-be-tested memory with both symmetrical and asymmetrical clock signals, allowing it to execute write and read commands, and a processing module to compare storage data with preset data to determine clock signal tolerance, adjusting the duty cycle as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single asymmetrical clock signal is used for memory testing, then the test can be performed, but large errors occur and actual performance parameters cannot be obtained
Solution Approach 1:
The test system segments the clock signal testing into two separate signal paths: one for write operations and one for read operations. This allows independent optimization of each path's clock signal characteristics, enabling accurate measurement of clock signal tolerance without requiring a single complex asymmetrical signal for both operations.
Solution Approach 2:
The system changes the duty cycle parameter of clock signals by providing both symmetrical (50% duty cycle) and asymmetrical (non-50% duty cycle) clock signals to the memory device. By comparing test results across different duty cycle parameters, the system accurately determines clock signal tolerance ranges and identifies actual performance parameters.
2Measurement precision
If only symmetrical clock signals are used for testing, then the test system is simple to operate, but the actual performance parameters of the memory cannot be accurately determined
Solution Approach 1:
The test system dynamically adjusts clock signal characteristics by switching between symmetrical and asymmetrical clock signals based on the specific test requirements. The signal providing module can change signal parameters in real-time, allowing the system to adapt to different testing scenarios and accurately measure memory performance under varying clock conditions.
Solution Approach 2:
The signal providing module acts as an intermediary that generates and conditions clock signals with specific duty cycles. It mediates between the test controller and the memory device, transforming control commands into appropriate symmetrical or asymmetrical clock signals, thereby simplifying the overall operation while enabling precise performance measurement.
3Measurement precision
If asymmetrical clock signals with different duty cycles are used, then accurate clock signal tolerance can be determined, but the test process becomes more complex
Solution Approach 1:
The signal providing module is designed with multi-functionality, capable of generating both symmetrical and asymmetrical clock signals with adjustable duty cycles. This universal signal generation capability allows the module to handle various test scenarios without requiring separate dedicated hardware for each signal type, reducing overall system complexity while maintaining measurement accuracy.
Data Source
AI summary
The present disclosure provides a test system and a test method. The test system includes: a signal providing module, configured to provide a first clock signal and a second clock signal for a to-be-tested memory, the to-be-tested memory executes a write command based on the first clock signal, so that the to-be-tested memory stores preset data, and the to-be-tested memory executes a read command based on the second clock signal, to read storage data stored in the to-be-tested memory; and one of the first clock signal and the second clock signal is a symmetrical clock signal, and the other is an asymmetrical clock signal with a preset duty cycle; and a processing module, configured to obtain the storage data, and obtain a clock signal tolerance of the to-be-tested memory according to a comparison result between the storage data and the preset data.