Low Noise Constant-Input Limit Cycle-Free Second Order Digital Filters

Abstract

In this paper, a constant-input limit cycle-free second-order digital filter section that appeared in the literature in 1986 is revisited. It is studied how its relative output roundoff-noise variance depends on a free parameter used in the network synthesis. Details on the synthesis procedure and an output noise analysis for that structure are here addressed. A graphical study is presented, and, as the final conclusion, it is pointed out that the relative output roundoff noise variance is minimized, for that structure, in some cases