Apparatus for identification of locations of a circuit...

Details Apparatus for identification of locations of a circuit... Apparatus for identification of locations of a circuit...

2007-04-24

2007-04-24

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

Reexamination Certificate

active

10761903

ABSTRACT:
A test circuit for identification of locations with low speed performance. A grid of ring oscillator units and switches connect or disconnect the ring oscillator units to or from each other, such that the locations with low speed performance are identified according to frequencies of oscillation signals generated by rows and columns of ring oscillators respectively formed by operating the test circuit in two different modes.

REFERENCES:
patent: 5790479 (1998-08-01), Conn
patent: 6071003 (2000-06-01), Ashuri et al.
patent: 6134191 (2000-10-01), Alfke
patent: 6496030 (2002-12-01), Kaneko

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