Calibration method of time measurement apparatus

Details Calibration method of time measurement apparatus Calibration method of time measurement apparatus

2007-02-27

2007-02-27

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Timing

Reexamination Certificate

active

10936365

ABSTRACT:
There is provided a calibration method for a time measurement apparatus having a time-voltage converter for converting the time interval of measurement signals and clock signals to voltage, an analog-digital converter for converting this voltage to digital values, and a time interval measurement device for measuring this time interval from these digital values. The method includes a calibration signal generation step for calibrating the calibration signals for the subperiod of these clock signals, with these calibration signals having a shorter period difference than the time which corresponds to the resolution of this analog-digital converter; a frequency distribution analysis step for repeatedly measuring these calibration signals, finding this digital value, and analyzing the cumulative frequency distribution of these digital values; and a calibration determining step for determining the calibration value of these digital values such that this cumulative frequency distribution is linear.

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patent: 2004/0098634 (2004-05-01), Zerbe et al.
patent: 09171088 (1997-06-01), None

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