Paper Info
Title
Digital amplifier of 96 kHz PWM frequency with 91dB dynamic range and 0.13% THD+N at full modulation.
Abstract
A Pulse Width Modulation digital amplifier is implemented at 96 kHz of switching frequency, significantly lower than the conventional 384 kHz. This provides numerous advantages: less computational time; lower thermal burden on the output stage power MOSFETs; higher Modulation Index; and lower production cost. The implemented system provides 91dB of Dynamic Range with optimized Noise-Shaper coefficients and satisfies the need of most consumer audio products. The Total Harmonic Distortion + Noise ratio, with the optimized clipping compensation of the NS overflow, is 0.13% at full modulation. The reduced THD+N and switching loss increase the maximum output power at fixed levels of power supply voltage and speaker impedance(1).
Year
DOI
Venue
2012
10.1109/TCE.2012.6415000
IEEE Trans. Consumer Electronics
Keywords
Field
DocType
amplifiers,noise,power MOSFET,pulse width modulation,switching,PWM frequency,clipping compensation,frequency 384 kHz,frequency 96 kHz,full modulation,modulation index,optimized noise-shaper coefficients,output stage power MOSFET,power supply voltage,pulse width modulation digital amplifier,speaker impedance,switching frequency,total harmonic distortion-noise ratio,Modulation Index,Noise-Shaper,PWM frequency,digital amplifier
Modulation index,Total harmonic distortion,Dynamic range,Computer science,Power MOSFET,Pulse-width modulation,Electrical impedance,Electronic engineering,Modulation,Electrical engineering,Amplifier
Journal
Volume
Issue
ISSN
58
4
0098-3063
Citations 
PageRank 
References 
1
0.35
3
Authors
3
Name
Order
Citations
PageRank
KyoungSoo Park1119873.47
Zaegyoo Hah210.35
Koeng-Mo Sung326835.38