Title :
Design limitations for digital audio power amplification
Author :
Hiorns, R.E. ; Goldberg, J.M. ; Sandler, M.B.
Author_Institution :
Sound Eng., Electron. & Eng., King´´s Coll., London, UK
Abstract :
The factors which limit linearity and resolution in digital to analogue conversion (DAC) based on pulse width modulation (PWM) and oversampled noise shaping (ONS) are compared using signal to noise ratio (SNR) and total harmonic distortion (THD) figures. Solutions to each of these factors are suggested, with an indication of the level of effectiveness that can be expected in a practical PWM/ONS digital power amplifier. Results imply that using current technology, 146 dB SNR and THD can be achieved with this type of audio power amplifier
Keywords :
audio-frequency amplifiers; digital circuits; digital-analogue conversion; power amplifiers; pulse width modulation; DAC; ONS; PWM; PWM/ONS digital power amplifier; SNR; THD; digital audio power amplification; digital to analogue conversion; linearity; oversampled noise shaping; pulse width modulation; resolution; signal to noise ratio; total harmonic distortion;
Conference_Titel :
Digital Audio Signal Processing, IEE Colloquium on
Conference_Location :
London
