Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Reexamination Certificate
2005-11-30
2009-02-24
Nguyen, Vincent Q. (Department: 2831)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
C324S076350
Reexamination Certificate
active
07495429
ABSTRACT:
A circuit board with a processing unit and a delay line with a controllable number of delay elements fabricated thereon includes apparatus for testing and calibrating the delay line elements. In the test mode, a calibrated pulse is delayed by the delay line while determining the logic state of pulse at two times, the interval between the two times being the same as the pulse width. By adding delay elements, the period of the calibrated pulse as a function of number of delay elements can determine the delay of each delay element. In the calibration mode, the delay line is configured as a ring oscillator and the frequency of the ring oscillator as a function of number of delay elements provides the time delay for the individual elements.
REFERENCES:
patent: 6091891 (2000-07-01), Overall et al.
patent: 6390579 (2002-05-01), Roylance et al.
Figoli David A.
Tessarolo Alexander
Brady III Wade J.
He Amy
Nguyen Vincent Q.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
LandOfFree
Apparatus and method for test, characterization, and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for test, characterization, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for test, characterization, and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4100453