Compensation of sample-and-hold distortion through zero insertion

Abstract

A new analytic method is presented for the compensation of the (sin x)/x distortion inherent to digital or sampled-data systems with continuous-time output signals. The compensation is achieved through the insertion of a pair of finite zeros in the transfer function of the system. Simple expressions are provided for the calculation of the magnitude and the Q-factor of the zeros of the compensation function. An example illustrates the efficiency and the applicability of the new method.