Patent ID: 6549859
Filing Date: 2003-04-15
Classification: G01R

Abstract:
A method of time stamping an edge of an input signal comprising the steps of:a) generating a reference edge having timed marked digital data values; b) defining at least a first time stamp in the reference edge; c) acquiring digital data samples of the input signal to create a waveform record of the input signal; d) comparing the digital data samples of a waveform record edge to time equivalent digital data values of the reference edge to generate amplitude error vectors representative of the difference between the digital data samples of the waveform record edge and the time equivalent digital data values of the reference edge; e) summing the amplitude error vectors to generate a total error value; f) generating a time offset value from the total error value to vary the time location of the reference edge; g) repeating steps (d) through (f) to minimize the total error value; h) combining the time offset value at the minimum total error value with a time location of nearest digital data sample of the waveform record edge to generate a waveform record edge time stamp.