ACCURATE TIME DELAY SYSTEM AND METHOD UTILIZING AN INACCURATE OSCILLATOR

摘要

A time delay system and method utilize an accurate clock signal (280) with aknown frequency to calibrate an inaccurate clock signal (215) that will be used togenerate a desired time delay. In the case that the frequency of the inaccurate clocksignal (215) is lower than the frequency of the accurate clock signal (280), thenumber of cycles of the accurate clock signal (280) that occur during apredetermined portion of the inaccurate clock signal (215) is used to calibrate theinaccurate clock signal (215). Alternately, if the frequency of the inaccurate clocksignal (215) is higher than the frequency of the accurate clock signal (280), the numberof cycles of the inaccurate clock signal (215) that occur during apredetermined portion of the accurate clock signal (280) is used in the calibration.The calibrated inaccurate clock signal (215) is then utilized to generate an accuratetime delay.