Patent ID: 7216046
Filing Date: 2007-05-08
Classification: G01R

Abstract:
1. A method of generating a variable persistence waveform database comprising the steps of: defining a First-In-First-Out time-ordered queue buffer for maintaining a selected number of waveform records; acquiring digital data samples of a measurement signal in a plurality of waveform records with each digital data sample having a magnitude value and time value; storing each acquired waveform record in the First-In-First-Out time-ordered queue buffer; accumulating counts of the digital data samples for the plurality of waveform records in the waveform database having an addressed array of counters with addresses defined by the magnitude values of the digital data samples and relative time each sample is acquired; upon filling First-In-First-Out time-ordered queue buffer with waveform records, subtracting the digital data samples of the oldest acquired waveform record from the accumulated counts of the waveform database and deleting the waveform record from the First-In-First-Out time-ordered queue buffer and storing the newest acquired waveform record to the First-In-First-Out time-ordered queue buffer and adding the counts of the digital data samples of the latest acquired waveform record into the waveform database; and displaying the accumulated counts of the waveform database on a display device.