Testing and inspection
What is the test called that runs at the actual operating frequency to detect defects where signals propagate too slowly?
- ADC test
- BVisual inspection
- CAt-speed test
Show answer and explanation
Answer: C. At-speed test
In fine-geometry LSIs, delay defects are a problem: the circuit works logically, but a slight defect lengthens signal propagation time. At-speed testing at the actual operating frequency detects such defects using patterns based on delay fault models and similar approaches.