Abstract: An integrated circuit for indicating the angular position of a rotating crankshaft corrected for crankshaft acceleration and deceleration. The circuit counts crankshaft markers spaced at equal angles about the crankshaft to produce a coarse grain position of the crankshaft. The circuit computes the time for the crankshaft to rotate to a series of incremental positions between contiguous markers and extrapolates a plurality of fine grain incremental positions of the crankshaft as a function of prior changes in velocity of the crankshaft. The coarse grain position is added to a fine grain position to produce a real time position of the crankshaft. A digital position bus communicates the real time crankshaft position. The circuit also computes both the velocity of the crankshaft after detecting each marker and the average acceleration of the crankshaft between contiguous markers for output over a digital velocity bus and a digital acceleration bus.