TY - GEN
T1 - A Class-D Piezoelectric Speaker Driver Using A Quadrature Feedback Chopping Scheme achieving 29dB Large-Signal THD+N Improvement
AU - Karmakar, Shoubhik
AU - Zhang, Huajun
AU - Berkhout, Marco
AU - Fan, Qinwen
N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
PY - 2023
Y1 - 2023
N2 - This paper presents a Class-D piezoelectric speaker driver that employs a quadrature feedback chopping scheme (QCS). Compared to a conventional single feedback chopping scheme (SCS), the use of QCS can eliminate the timing skew between low-voltage (LV) and high-voltage (HV) choppers, greatly improving large-signal linearity. A prototype implemented in a 180nm BCD process achieves a peak THD+N of 88dB/-92.5dB for a 1kHz/6kHz input frequency and 37μ VR MS output noise (A-weighted) while driving a 4μ F load. Thanks to QCS, the large-signal THD+N has been improved by 29 dB, while the output voltage swing achieving -60dB THD+N has been extended from 86.9% to 99.5% of the full-scale (FS).
AB - This paper presents a Class-D piezoelectric speaker driver that employs a quadrature feedback chopping scheme (QCS). Compared to a conventional single feedback chopping scheme (SCS), the use of QCS can eliminate the timing skew between low-voltage (LV) and high-voltage (HV) choppers, greatly improving large-signal linearity. A prototype implemented in a 180nm BCD process achieves a peak THD+N of 88dB/-92.5dB for a 1kHz/6kHz input frequency and 37μ VR MS output noise (A-weighted) while driving a 4μ F load. Thanks to QCS, the large-signal THD+N has been improved by 29 dB, while the output voltage swing achieving -60dB THD+N has been extended from 86.9% to 99.5% of the full-scale (FS).
UR - http://www.scopus.com/inward/record.url?scp=85167626018&partnerID=8YFLogxK
U2 - 10.23919/VLSITechnologyandCir57934.2023.10185166
DO - 10.23919/VLSITechnologyandCir57934.2023.10185166
M3 - Conference contribution
AN - SCOPUS:85167626018
SN - 979-8-3503-4669-5
T3 - Digest of Technical Papers - Symposium on VLSI Technology
BT - Proceedings of the 2023 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2023
PB - IEEE
T2 - 2023 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2023
Y2 - 11 June 2023 through 16 June 2023
ER -