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Technological Innovation for the Internet of Things 4th IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2013, Costa de Caparica, Portugal, April 15-17, 2013. Proceedings |
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Conference papers
Design of a Fully Differential Power Output Stage for a Class D Audio Amplifier Using a Single-Ended Power Supply
Abstract : This paper presents a full-bridge discrete power output stage for a Class D audio amplifier using a single-ended power supply. The circuit receives a digital control signal with 5 V of amplitude and it generates a floating differential output voltage up to 20 V of amplitude from a single 20 V power supply voltage. Using as control signal a pulse density modulation (PDM) wave generated by an optimized 3rd order continuous-time (CT) sigma delta modulator (ΣΔM), the system achieves a signal-to-noise-plus-distortion ratio (SNDR) of 83.1 dB, total harmonic distortion (THD) of -89 dB and a power efficiency of 92 %, while delivering 11 W over an 8-Ω load with a signal bandwidth of 20 kHz and a sampling frequency of 1.28 MHz.
Cited literature [11 references]
https://hal.archives-ouvertes.fr/hal-01348803
Contributor : Hal Ifip <>
Submitted on : Monday, July 25, 2016 - 4:52:20 PM
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Contributor : Hal Ifip <>
Submitted on : Monday, July 25, 2016 - 4:52:20 PM
Last modification on : Monday, July 25, 2016 - 5:05:50 PM
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