Print Email Facebook Twitter A 121.4-dB DR Capacitively Coupled Chopper Class-D Audio Amplifier Title A 121.4-dB DR Capacitively Coupled Chopper Class-D Audio Amplifier Author Zhang, H. (TU Delft Electronic Instrumentation) Berkhout, Marco (Goodix Technologies) Makinwa, K.A.A. (TU Delft Microelectronics) Fan, Q. (TU Delft Microelectronics) Department Microelectronics Date 2022 Abstract This article presents a class-D amplifier (CDA) with high dynamic range (DR). To eliminate the typically dominant noise contribution of a resistive feedback network, the input and feedback signals are chopped and applied to a capacitive feedback network. However, this leads to high-voltage (HV) transients at the input of the loop filter, which, due to timing and impedance mismatch in the chopped feedback network, could degrade linearity and even overstress low-voltage (LV) core devices. Robust processing of the HV chopped feedback signal is guaranteed with chopper timing skew correction, chopper impedance matching, and deadbanding. The prototype, implemented in a 180-nm bipolar-CMOS-DMOS (BCD) process, achieves 121.4 dB of DR, 5.9 dB higher than state-of-the-art closed-loop CDAs, and 8-μVRMS output-referred noise (A-weighted). It also achieves a peak total harmonic distortion (THD) + N of -109.8 dB and a peak efficiency of 93%/88% while driving 15 W/26 W into an 8-4-Ω load. Subject Audio power amplifiercapacitively coupled chopper amplifierclass-D amplifier (CDA)dynamic range (DR)noise To reference this document use: http://resolver.tudelft.nl/uuid:26983a4f-39ca-4340-9b80-fb3f53b67636 DOI https://doi.org/10.1109/JSSC.2022.3207907 Embargo date 2023-06-15 ISSN 0018-9200 Source IEEE Journal of Solid State Circuits, 57 (12), 3736-3745 Bibliographical note 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. Part of collection Institutional Repository Document type journal article Rights © 2022 H. Zhang, Marco Berkhout, K.A.A. Makinwa, Q. Fan Files PDF A_121.4_dB_DR_Capacitivel ... lifier.pdf 4.44 MB Close viewer /islandora/object/uuid:26983a4f-39ca-4340-9b80-fb3f53b67636/datastream/OBJ/view