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Paper Abstract and Keywords
Presentation 2004-10-22 14:15
A class-D amplifier using a spectrum shaping technique
Akira Yasuda (Hosei Univ.), Takashi Kimura, Koichiro Ochiai, Toshihiko Hamasaki (TI Japan) Link to ES Tech. Rep. Archives: ICD2004-130
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a new class-D amplifier with a lower-frequency reference signal by using a spectrum shap-ing technique, in order to reduce an out-of-band noise, which improves an interference problem even when radio equipment independently designed. The peak-level of the measured out-of-band noise is 15dB lower than conventional class-D amplifier. The chip realizes THD of 0.45% and SNR of 81dB. The test chip can operate at single 2V power sup-ply.
Keyword (in Japanese) (See Japanese page) 
(in English) Class-D / Amplifier / spectrum shaping / Audio / / / /  
Reference Info. IEICE Tech. Rep., vol. 104, no. 366, ICD2004-130, pp. 55-60, Oct. 2004.
Paper # ICD2004-130 
Date of Issue 2004-10-15 (SIP, ICD, IE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF Link to ES Tech. Rep. Archives: ICD2004-130

Conference Information
Conference Date 2004-10-21 - 2004-10-22 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To ICD 
Conference Code 2004-10-IE-SIP-ICD-IPSJ-SLDM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A class-D amplifier using a spectrum shaping technique 
Sub Title (in English)  
Keyword(1) Class-D  
Keyword(2) Amplifier  
Keyword(3) spectrum shaping  
Keyword(4) Audio  
1st Author's Name Akira Yasuda  
1st Author's Affiliation Hosei University (Hosei Univ.)
2nd Author's Name Takashi Kimura  
2nd Author's Affiliation Texas Instruments Japan Inc. (TI Japan)
3rd Author's Name Koichiro Ochiai  
3rd Author's Affiliation Texas Instruments Japan Inc. (TI Japan)
4th Author's Name Toshihiko Hamasaki  
4th Author's Affiliation Texas Instruments Japan Inc. (TI Japan)
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Date Time 2004-10-22 14:15:00 
Presentation Time 25 
Registration for ICD 
Paper # IEICE-SIP2004-98,IEICE-ICD2004-130,IEICE-IE2004-74 
Volume (vol) IEICE-104 
Number (no) no.364(SIP), no.366(ICD), no.368(IE) 
Page pp.55-60 
#Pages IEICE-6 
Date of Issue IEICE-SIP-2004-10-15,IEICE-ICD-2004-10-15,IEICE-IE-2004-10-15 

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