Oscillation based access time measurement
   
   

An embodiment of the invention is a method for measuring access time where the frequency of a ring oscillator is measured with and without a device under test 1 in the ring. Those two frequencies are compared to calculate the access time of the device under test 1. Another embodiment of the invention is circuitry 25 that measures the frequency of a ring oscillator with and without a device under test 1. Again the two frequencies are compared to calculate the access time of the device under test 1.

 
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