Patent ID: 6552531
Filing Date: 2003-04-22
Classification: G01D,G01P

Abstract:
Method of suppressing signal noise found on the signal generated by an active motion sensor, wherein the signal includes a first sequence of input pulses that contain motion information, comprising the steps of:integrating each input pulse so that the integrated signal rises during the input pulse and declines when no input pulse prevails, generating an output pulse between a time where the integrated signal is in excess of a predeterminable second threshold value after a predeterminable first threshold value has been exceeded and the time where the integrated signal during the decline lies below the first threshold value after having dropped below the second threshold value so that the output pulse is delayed in time with respect to the input pulse, and initiating a current flow upon sensing the input pulse, and initiating charging a charge storage device when the current flow reaches a predetermined value, wherein a charge of the charge storage device is the integrated signal.