Ring oscillator structure and method of separating random...

Details Ring oscillator structure and method of separating random... Ring oscillator structure and method of separating random...

2007-09-04

2007-09-04

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Performance or efficiency evaluation

C331S057000, C331S044000

Reexamination Certificate

active

11162197

ABSTRACT:
A ring oscillator test structure comprises at least two overlapping rings that are switchable between different numbers of stages. A delay distribution is measured for various numbers of stages in a set of oscillators formed in different locations subject to different systematic delay effects. The delay distributions are analyzed to isolate the systematic and the random contributions to the standard deviation of the distributions.

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