Abstract
Piezoelectric speakers are gaining popularity on account of their improving form-factor and audio quality, making them a good fit for many audio applications such as in televisions, laptops, etc. Such speakers can be modelled as a large capacitive load, and so are typically driven by a Class-AB amplifier via a series resistor that ensures driver stability, and limits load current, but wastes power [1], [2]. In [3], the Class-AB amplifier is replaced by a more power-efficient Class-D amplifier (CDA) in series with an additional inductor. However, a series resistor is still required to damp the resulting LC resonant circuit, which could otherwise draw excessive currents when excited by large-signal distortion (e.g. clipping) harmonics around the LC resonance frequency. Alternatively, by using a feed-forward architecture based on LC filter diagnostics to limit overshoot currents, the series resistor can be replaced by a second inductor, at the expense of increased system complexity and cost [4].
Original language | English |
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Title of host publication | 2022 IEEE International Solid-State Circuits Conference, ISSCC 2022 |
Subtitle of host publication | Digest of technical papers |
Editors | Laura C. Fujino |
Place of Publication | Danvers |
Publisher | IEEE |
Pages | 488-490 |
Number of pages | 3 |
ISBN (Electronic) | 978-1-6654-2800-2 |
ISBN (Print) | 978-1-6654-2801-9 |
DOIs | |
Publication status | Published - 2022 |
Event | 2022 IEEE International Solid- State Circuits Conference (ISSCC) - Online at San Francisco, United States Duration: 20 Feb 2022 → 26 Feb 2022 |
Publication series
Name | Digest of Technical Papers - IEEE International Solid-State Circuits Conference |
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Volume | 2022-February |
ISSN (Print) | 0193-6530 |
Conference
Conference | 2022 IEEE International Solid- State Circuits Conference (ISSCC) |
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Abbreviated title | ISSCC 2022 |
Country/Territory | United States |
City | Online at San Francisco |
Period | 20/02/22 → 26/02/22 |
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.