Circuits and methods for calibrating a delay element

Details Circuits and methods for calibrating a delay element Circuits and methods for calibrating a delay element

2011-03-08

2011-03-08

Schechter, Andrew (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S064000, C702S065000, C702S072000

Reexamination Certificate

active

07904265

ABSTRACT:
A controllable delay element is coupled in parallel with a calibration circuit. The calibration circuit receives a periodic reference signal and generates a series of sample voltages responsive to a time-varying analog voltage, the periodic reference signal, and the delayed periodic signal at the output of the controllable delay element. The calibration circuit distributes the series of sampled voltages for determining the components of a first vector. The first vector components are used to calculate the phase that results from a control signal applied to the controllable delay element. After the control signal is modified, a second vector is used to calculate the phase that results from the control signal. The delay can be determined by the product of the period of the reference signal and the difference in phase.

REFERENCES:
patent: 7062733 (2006-06-01), Poskatcheev et al.
patent: 7210074 (2007-04-01), Mc Auliffe

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