Abstract: A method for identifying a principal tooth in a series of teeth extending along at least a portion of a periphery of a rotatable object includes the steps of rotating the rotatable object, setting a counter to a predetermined value, measuring a first tooth in the series of teeth to obtain a first measurement, adding a qualifying value to the measurement to obtain a qualification measurement, measuring a second tooth in the series of teeth to obtain a second measurement, comparing the second measurement to the qualification measurement, and identifying the second tooth as the principal tooth when the second measurement exceeds the qualification measurement.

Abstract: A filtering device for filtering noise from an electronic signal having a plurality of defined periods includes an input terminal for receiving the electronic signal, a period divider for dividing each of the definable periods into an equal number of subdivisions, a filter creating a latching signal for a predetermined portion of the number of subdivisions, and a latch for receiving the latching signal from the filter and for maintaining the electronic signal in steady state for a predetermined portion of the number of subdivisions.

Abstract: A camshaft revolution sensing assembly for identifying a revolution of a camshaft, having a plurality of teeth, of an internal combustion engine of an automotive vehicle includes a camshaft sensor for sensing revolutions of a camshaft by sensing each of the teeth as they rotate therepast and producing a camshaft sensor output, a subtracting device operatively connected to the camshaft sensor, the subtracting device subtracting each time the camshaft sensor senses one of the teeth rotating therepast, and a signal generator operatively connected to the subtracting device wherein the signal generator generates a signal indicating the subtracting device has subtracted to a predetermined value.

Abstract: A method and system for generating a position dependent output control signal. The position of a rotating machine, such as an internal combustion engine, is sensed and a corresponding position signal is generated. The position signal is processed to obtain the position dependent output control signal including a first control signal and a second control signal. The first control signal represents a sector of the rotating machine, and the second control signal represents the absolute position within the sector.