A 3rd order 1.5-bit continuous-time (CT) Sigma-Delta (ΣΔ) modulator optimized for Class D audio power amplifier

Nuno Filipe Silva Veríssimo Paulino; DEE Group Author

A 3rd order 1.5-bit continuous-time (CT) Sigma-Delta (ΣΔ) modulator optimized for Class D audio power amplifier

Nuno Filipe Silva Veríssimo Paulino, DEE Group Author

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator show that it has a maximum SNDR value of 82.4 dB and a dynamic range (DR) of 76 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. The use of a full-bridge output stage allows 1.5-bit quantization.

Original language	Unknown
Title of host publication	-
Pages	531 - 535
Publication status	Published - 1 Jan 2010
Event	Mixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference - Duration: 1 Jan 2010 → …

Conference

Conference	Mixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference
Period	1/01/10 → …

Access to Document

http://oa.uninova.pt/2515/

Cite this

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title = "A 3rd order 1.5-bit continuous-time (CT) Sigma-Delta (ΣΔ) modulator optimized for Class D audio power amplifier",

abstract = "This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator show that it has a maximum SNDR value of 82.4 dB and a dynamic range (DR) of 76 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. The use of a full-bridge output stage allows 1.5-bit quantization.",

author = "Paulino, {Nuno Filipe Silva Ver{\'i}ssimo} and {DEE Group Author}",

year = "2010",

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AU - DEE Group Author

PY - 2010/1/1

Y1 - 2010/1/1

N2 - This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator show that it has a maximum SNDR value of 82.4 dB and a dynamic range (DR) of 76 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. The use of a full-bridge output stage allows 1.5-bit quantization.

AB - This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator show that it has a maximum SNDR value of 82.4 dB and a dynamic range (DR) of 76 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. The use of a full-bridge output stage allows 1.5-bit quantization.

M3 - Conference contribution

SP - 531

EP - 535

BT - -

Y2 - 1 January 2010

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