In this paper, an improved algorithm for natural sampling is presented that is suitable for digitally controlled fixed frequency PWM modulators. With only 5 MAC operations, 4 multiplications, and 2 additions, the algorithm calculates both switching times for double-sided 3-level PWM, and offers more than 100 dB between signal and PWM related distortion products for high fidelity audio applications. These features compare well with results published [2-6]. The algorithm can be combined with a noise shaped local feedback for quantized pulse lengths and the digital modulator can be integrated into a global feedback loop.

Authors: Wegner, Carsten; Schwann, Robert; Ehrhardt, Dietmar
Affiliations: CAMCO Produktions- und Vertrieb-GmbH, Wenden, Germany; Universität Siegen, Siegen, Germany(See document for exact affiliation information.)
AES Convention: 142 (May 2017) Paper Number: 9783
Publication Date: May 11, 2017 Import into BibTeX
Subject: Posters: Transducers, Systems, and Effects
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=18659

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