Estimations of the sinusoidal signal parameters using the non-uniform exponential tracking A/D conversion

Abstract

High quality analog-to-digital (A/D) conversion is obtained using the non-uniform exponential tracking procedure. Samples of the analog signal and differences of the previous estimations are cycled rapidly through a non-uniform coarse quntizer while the round off error is fed back and subtracted from the input. It has been shown that the proposed A/D conversion gives better results than a classical A/D conversion with the successive approximation procedure due to b-times more available sampling points and the adaptive property of the A/D procedure that every previous approximation step to signal become the centre of observation with exponential increasing resolution in the new step. Evaluation of the exponential tracking A/D conversion performs better results considering both systematic and random errors than the tracking A/D procedure with a uniform quantization.