TY - GEN
T1 - A Delta-Sigma Modulator with UPWM Quantizer for Digital Audio Class-D Amplifier
AU - Kuo, Chien Hung
AU - Liou, Yu Jie
N1 - Publisher Copyright:
© 2019 Department of Microelectronics and Computer Science, Lodz University of Technology.
PY - 2019/6
Y1 - 2019/6
N2 - In this paper, a delta-sigma modulator (DSM) with uniform pulse-width modulation (UPWM) quantizer for digital audio class-D power amplifier is presented. A pole-moving approach for Inverse Chebyshev filters is proposed to stabilize the UPWM modulator as well as improve its performance. The characteristics of the saw-Tooth carrier for UPWM quantizer is explored to reduce the output switching rate and the power loss in class-D amplifier in the pulse-density modulation (PDM) case. In the presented single-loop sixth-order UPWM modulator with the ameliorated saw-Tooth carrier, an SNDR of 120 dB within 20-kHz bandwidth can be achieved under full-scale signal input. With the proposed schemes, the highest transfer efficiency of 1 for digital class-D amplifier can also be obtained.
AB - In this paper, a delta-sigma modulator (DSM) with uniform pulse-width modulation (UPWM) quantizer for digital audio class-D power amplifier is presented. A pole-moving approach for Inverse Chebyshev filters is proposed to stabilize the UPWM modulator as well as improve its performance. The characteristics of the saw-Tooth carrier for UPWM quantizer is explored to reduce the output switching rate and the power loss in class-D amplifier in the pulse-density modulation (PDM) case. In the presented single-loop sixth-order UPWM modulator with the ameliorated saw-Tooth carrier, an SNDR of 120 dB within 20-kHz bandwidth can be achieved under full-scale signal input. With the proposed schemes, the highest transfer efficiency of 1 for digital class-D amplifier can also be obtained.
KW - class-D amplifier
KW - delta-sigma modulator
KW - pole-moving
KW - pulse-width modulation
KW - saw-Tooth
UR - http://www.scopus.com/inward/record.url?scp=85071311844&partnerID=8YFLogxK
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U2 - 10.23919/MIXDES.2019.8787135
DO - 10.23919/MIXDES.2019.8787135
M3 - Conference contribution
AN - SCOPUS:85071311844
T3 - Proceedings of the 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019
SP - 293
EP - 297
BT - Proceedings of the 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019
A2 - Napieralski, Andrzej
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019
Y2 - 27 June 2019 through 29 June 2019
ER -