Patent ID: 7068191
Filing Date: 2006-06-27
Classification: G01P,H02P

Abstract:
1. A method of determining a numerical value representing the duration of a received periodically repeating pulsed signal ( 68 ), comprising the steps of: a) determining, at time intervals, the period length (T) of the received signal; b) determining, at time intervals, a characteristic magnitude (t; t′) representing the length of a pulse of that received signal ( c) ascertaining, from the period length (T) and the characteristic magnitude (t; t′), a numerical value that characterizes the received signal ( wherein, for determination of the period length (T) or the characteristic magnitude (t; t′), at a first signal edge at the beginning of a time span to be measured, a first interrupt that initiates a first time measurement is generated; and at a second signal edge at the end of the time span to be measured, a second interrupt is generated that initiates a second time measurement.