Why Class-D Audio Amplifiers Work Well: A Theoretical Explanation

Authors

Kevin Alvarez, The University of Texas at El PasoFollow
Julio Urenda, The University of Texas at El PasoFollow
Vladik Kreinovich, The University of Texas at El PasoFollow

Publication Date

4-2020

Comments

Technical Report: UTEP-CS-20-26

Abstract

Most current high-quality electronic audio systems use class-D audio amplifiers (D-amps, for short), in which a signal is represented by a sequence of pulses of fixed height, pulses whose duration at any given moment of time linearly depends on the amplitude of the input signal at this moment of time. In this paper, we explain the efficiency of this signal representation by showing that this representation is the least vulnerable to additive noise (that affect measuring the signal itself) and to measurement errors corresponding to measuring time.