Cart (Loading....) | Create Account
Close category search window
 

Digital amplifier of 96 kHz PWM frequency with 91dB dynamic range and 0.13% THD+N at full modulation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
3 Author(s)
Park Kyoungsoo ; Sch. of Electr. Eng. & Comput. Sci. & Inst. of New Media & Commun., Seoul Nat. Univ., Seoul, South Korea ; Zaegyoo Hah ; Koeng-Mo Sung

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.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 4 )

Date of Publication:

November 2012

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.