Abstract
This paper describes a class-D audio amplifier with a multilevel output stage that reduces both EMI and idle power. High loop gain, and thus high linearity, are enabled by a relatively high (4.2 MHz) switching frequency, which relaxes the requirements on its output LC filter. Fabricated in a 180nm BCD technology, it can drive 14 W into an 8-Ω load with state-of-the-art performance: -107.8 dB THD+N, 91% peak efficiency, and 7 mA quiescent current. It meets the CISPR 25 Class 5 radiated emission standard with a low-cost 580 kHz LC filter, improving the state-of-the-art by 5.8x.
| Original language | English |
|---|---|
| Title of host publication | 2020 IEEE Symposium on VLSI Circuits |
| Subtitle of host publication | Proceedings |
| Place of Publication | Piscataway |
| Publisher | IEEE |
| Pages | 1-2 |
| Number of pages | 2 |
| ISBN (Electronic) | 978-1-7281-9942-9 |
| ISBN (Print) | 978-1-7281-9943-6 |
| DOIs | |
| Publication status | Published - 2020 |
| Event | 2020 IEEE Symposium on VLSI Circuits, VLSI Circuits 2020 - Honolulu, United States Duration: 16 Jun 2020 → 19 Jun 2020 |
Conference
| Conference | 2020 IEEE Symposium on VLSI Circuits, VLSI Circuits 2020 |
|---|---|
| Country/Territory | United States |
| City | Honolulu |
| Period | 16/06/20 → 19/06/20 |
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-careOtherwise 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.