Two-dimensional sinusoidal signal quality improvement by combined software and hardware means

This article describes a two-dimensional, quadrature, sinusoidal type signal correction. Such signals are widely popular e.g. in motor control, laser interferometry and sensors applications. It is proved that in some situations it is necessary to improve the quality of the signals in order to obtain the required parameters. We show that the optimum solution is a combination of hardware and software correction mechanisms. We report the signal improvement of a factor of more than a hundred. The proposed unique construction is also characterized by a very fast dynamic response in the range of single microseconds. This feature makes the circuit suitable for wide range of applications.