A dual-level dual-phase pulse-width modulation class-D amplifier with 0.001% THD, 112 dB SNR
This paper presents a dual-level dual-phase pulse-width modulation (DLDP PWM) Class-D audio amplifier circuit which enhance amplifier linearity and reduce distortion. The proposed DLDP PWM Class-D audio amplifier includes two sets of non-overlapping triangular waves, each at its respectful offset le...
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Published in | 2014 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 2676 - 2679 |
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Main Authors | , , , , , , , , , , , , , , , , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
01.06.2014
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Subjects | |
Online Access | Get full text |
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Summary: | This paper presents a dual-level dual-phase pulse-width modulation (DLDP PWM) Class-D audio amplifier circuit which enhance amplifier linearity and reduce distortion. The proposed DLDP PWM Class-D audio amplifier includes two sets of non-overlapping triangular waves, each at its respectful offset levels. Each set of triangular waves is composed of two 180° out-of-phase triangular waves. The differential power stage consists of 8 power transistors, with voltage swings up to +/- 6V. Simulated results shows that the proposed DLDP PWM Class-D audio amplifier features an SNR up to 105 dB, and the THD is suppressed below 0.001 %, with the 3rd harmonic below -102 dBV. |
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ISSN: | 0271-4302 2158-1525 |
DOI: | 10.1109/ISCAS.2014.6865724 |