NDLI: Realization of a digital PWM power amplifier using noise and ripple shaping

Content Provider	IEEE Xplore Digital Library
Author	Smith, K.M. Smedley, K.M. Yunhong Ma
Copyright Year	1995
Description	Author affiliation: Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA (Smith, K.M.; Smedley, K.M.; Yunhong Ma)
Abstract	A digital pulse width modulation technique featuring noise and ripple shaping (NRS) for audio power amplification is realized. The sampled and extrapolated power source amplitude signal is used to shape the interpolated input digital signal. This shaped signal is fed to a noise shaper to produce a reduced bit digital signal fully representing the original signal. The output power signal is not affected by the requantization error or the power source ripple. Therefore, DC power regulators can be eliminated without sacrificing the signal to noise ratio. A digital signal processor controlled full bridge power amplifier was built with close to 5 kHz bandwidth and 40 dB ripple rejection improvement at 60 Hz over conventional PWM power amplifiers.
Starting Page	96
Ending Page	102
File Size	594119
Page Count	7
File Format	PDF
ISBN	0780327306
DOI	10.1109/PESC.1995.474798
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-18
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation Power amplifiers Noise shaping Pulse amplifiers Pulse shaping methods Space vector pulse width modulation Digital modulation Noise reduction Power generation Regulators
Content Type	Text
Resource Type	Article

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