An 82-mW ΔΣ-Based Filter-Less Class-D Headphone Amplifier With −93-dB THD+N, 113-dB SNR, and 93% Efficiency

Autor:	Naoaki Nishimura, Preston Birdsong, Markova Mariana Tosheva, Atsushi Matamura, Abhishek Bandyopadhyay, Spirer Adam R, Shaolong Liu
Rok vydání:	2021
Předmět:	Physics Total harmonic distortion business.industry Amplifier Electrical engineering Decoupling capacitor Power (physics) Reduction (complexity) Filter (video) visual_art Electronic component visual_art.visual_art_medium Headphone amplifier Electrical and Electronic Engineering business
Zdroj:	IEEE Journal of Solid-State Circuits. 56:3573-3582
ISSN:	1558-173X 0018-9200
DOI:	10.1109/jssc.2021.3100548
Popis:	A low-power 113-dB SNR, -93-dB total harmonic distortion (THD)+N, digital input Δ Σ-based filter-less Class-D amplifier for wireless headphone applications is presented. This performance is achieved by the following architecture improvements: 1) variable-frequency-Δ Σ Class-D with digital feed-forward and switching-frequency reduction, 2) common-mode-stabilized power stage, 3) current digital-to-analog converter direct drive, and 4) rotational first-order dynamic-element-matching techniques. It operates on a single 1.8-V power supply with no external passive components except for a supply decoupling capacitor. The Class-D headphone amplifier achieves 82-mW non-clipping output power with 93% efficiency at a 16-Ω and 33-μH load condition. The complete system was fabricated in a 40-nm CMOS process and occupies 1.33-mm² die area.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::23219aeeb173e2da5fe125f5ae72fb22 https://doi.org/10.1109/jssc.2021.3100548 Zobrazit plný text záznamu