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https://doi.org/10.1109/SOCDC.2008.4815561
| Title: | A sigma-delta class D audio power amplifier in 0.35μm CMOS technology | Authors: | Junle, P. Libin, Y. Yong, L. |
Keywords: | Σ modulation 1.5bit quantization Feedforward |
Issue Date: | 2008 | Citation: | Junle, P.,Libin, Y.,Yong, L. (2008). A sigma-delta class D audio power amplifier in 0.35μm CMOS technology. 2008 International SoC Design Conference, ISOCC 2008 1 : I5-I8. ScholarBank@NUS Repository. https://doi.org/10.1109/SOCDC.2008.4815561 | Abstract: | This paper presents a single chip class D audio power amplifier realized in a 0.35μm CMOS technology. This chip consists of a high-linear single-loop feed-forward Sigma-Delta modulator with three level quantizer and a full H-bridge output stage. The three-level quantizer effectively reduces the switching activity of the output stage, especially when the input signal amplitude is low, hence improves the power efficiency. Direct feedback from H-bridge output improves the linearity of the amplifier. With a 3.3-V supply voltage and 4-Ohm load, the amplifier can deliver maximum 1-W output power with THD less than 0.8% at 8kHz and reaches a maximum power efficiency more than 80%. ©2008 IEEE. | Source Title: | 2008 International SoC Design Conference, ISOCC 2008 | URI: | http://scholarbank.nus.edu.sg/handle/10635/69065 | ISBN: | 9781424425990 | DOI: | 10.1109/SOCDC.2008.4815561 |
| Appears in Collections: | Staff Publications |
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