Algorithmic Pattern Generator Integration for ATE Signal Integrity
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Solution Overview
Problem
Automatic test equipment (ATE) systems face limitations in testing modern digital microelectronic devices due to cable length and impedance issues, which require a compact test pattern generator close to the device under test, but this setup often separates test pattern generation and processing functions, leading to increased test times when varying operational parameters.
Innovation Solution
An algorithmic pattern generator (APG) is integrated with a microelectronic device tester, allowing it to present iterative values of operational parameters, capture test results, and access configuration spaces without administrative host computer intervention, enabling autonomous execution of parametric tests, including timing, voltage, and temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the test pattern generator is located close to the DUT to reduce cable length and impedance issues, then signal integrity is improved, but the device complexity increases and processing functions must be separated
Solution Approach 1:
The patent combines the test pattern generator with the device under test into a single integrated circuit, merging previously separate functions (pattern generation, parameter variation, and testing) into one unified device. This integration reduces the need for external cables and separate processing equipment while maintaining signal integrity.
Solution Approach 2:
The integrated test pattern generator is designed to perform multiple functions including generating test patterns, varying operational parameters (voltage, temperature, timing), and interfacing with the DUT through a single device structure. This multi-functionality eliminates the need for separate administrative host computers and external parameter control equipment.
2Measurement precision
If parametric testing is performed with iterative parameter variations, then operational margins are analyzed, but test time increases due to host computer intervention
Solution Approach 1:
The integrated test pattern generator performs parametric testing autonomously without requiring external host computer intervention. The device self-manages parameter variations, test execution, and result collection, eliminating communication delays and enabling continuous testing operations.
Solution Approach 2:
The patent enables continuous parametric testing by eliminating interruptions caused by host computer communication. The integrated device maintains continuous operation through internal parameter variation and test execution, removing pauses that occur during data transfer and command reception in traditional systems.
3Reliability
If the test pattern generator is compact to reduce cable length, then signal integrity is improved, but the inability to collocate processing functions reduces productivity
Solution Approach 1:
The patent merges the test pattern generator with processing functions including parameter control, test execution, and result analysis into a single integrated device. This consolidation maintains compact form factor while enabling complete testing operations without external equipment, thereby improving productivity.
Solution Approach 2:
The patent transitions from a distributed system architecture (separate generator, host computer, and DUT) to an integrated single-chip implementation. This dimensional change from spatial distribution to integrated consolidation enables all functions to coexist in a compact form while maintaining full processing capability.
Data Source
AI summary
Embodiments herein may enable an algorithmic pattern generator (APG) to present iterative values of one or more operational parameters to a device under test (DUT). At each iteration, one or more test patterns may be presented to the DUT. The APG may capture test results from a set of iterations of the operational parameters. The APG may also write values associated with a next operational parameter to be iterated to a test parameter configuration space within the device tester.