Comparison of Simple Self-Oscillating PWM Modulators

Nicolai J. Dahl; Niels Elkjær Iversen; Arnold Knott; Michael A. E. Andersen

Comparison of Simple Self-Oscillating PWM Modulators

Nicolai J. Dahl, Niels Elkjær Iversen, Arnold Knott, Michael A. E. Andersen

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Abstract

Switch-mode power amplifiers has become the conventional choice for audio applications due to their superior efficiency and excellent audio performance. These amplifiers rely on high frequency modulation of the audio input. Conventional modulators use a fixed high frequency for modulation. Self-oscillating modulators do not have a fixed modulation frequency and can provide good audio performance with very simple circuitry. This paper proposes a new type of self-oscillating modulator. The proposed modulator is compared to an already existing modulator of similar type and their performances are compared both theoretically and experimentally. The result shows that the proposed modulator provides a higher degree of linearity resulting in around 2% lower Total Harmonic Distortion (THD).

Original language	English
Title of host publication	Proceedings of the 140th Audio Engineering Convention Convention.
Number of pages	9
Publisher	Audio Engineering Society
Publication date	2016
Article number	9562
Publication status	Published - 2016
Event	140th International Audio Engineering Society Convention - Paris, France Duration: 4 Jun 2016 → 7 Jun 2016

Conference

Conference	140th International Audio Engineering Society Convention
Country/Territory	France
City	Paris
Period	04/06/2016 → 07/06/2016

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title = "Comparison of Simple Self-Oscillating PWM Modulators",

abstract = "Switch-mode power amplifiers has become the conventional choice for audio applications due to their superior efficiency and excellent audio performance. These amplifiers rely on high frequency modulation of the audio input. Conventional modulators use a fixed high frequency for modulation. Self-oscillating modulators do not have a fixed modulation frequency and can provide good audio performance with very simple circuitry. This paper proposes a new type of self-oscillating modulator. The proposed modulator is compared to an already existing modulator of similar type and their performances are compared both theoretically and experimentally. The result shows that the proposed modulator provides a higher degree of linearity resulting in around 2% lower Total Harmonic Distortion (THD).",

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AU - Iversen, Niels Elkjær

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AU - Andersen, Michael A. E.

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Y1 - 2016

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AB - Switch-mode power amplifiers has become the conventional choice for audio applications due to their superior efficiency and excellent audio performance. These amplifiers rely on high frequency modulation of the audio input. Conventional modulators use a fixed high frequency for modulation. Self-oscillating modulators do not have a fixed modulation frequency and can provide good audio performance with very simple circuitry. This paper proposes a new type of self-oscillating modulator. The proposed modulator is compared to an already existing modulator of similar type and their performances are compared both theoretically and experimentally. The result shows that the proposed modulator provides a higher degree of linearity resulting in around 2% lower Total Harmonic Distortion (THD).

M3 - Article in proceedings

BT - Proceedings of the 140th Audio Engineering Convention Convention.

PB - Audio Engineering Society

T2 - 140th International Audio Engineering Society Convention

Y2 - 4 June 2016 through 7 June 2016

ER -

Comparison of Simple Self-Oscillating PWM Modulators

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