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Paper Abstract and Keywords
Presentation 2009-10-02 17:00
100-1000 MHz Cutoff Frequency, 0-12 dB Boost Programmable Gm-C Filter with Digital Calibration for HDD Read Channel
Takahide Terada (Hitachi, Ltd.), Koji Nasu (Renesas Tech Corp.), Taizo Yamawaki, Masaru Kokubo (Hitachi, Ltd.) ICD2009-60
Abstract (in Japanese) (See Japanese page) 
(in English) A programmable Gm-C filter with digital calibration for hard disk drive read channels was developed. The filter has gm and boost tuning circuits and DC offset cancellation circuits. Moreover, it has two types of digital calibrations for achieving a robust filter response. One is an initial calibration to compensate for the filter response variations over process changes. The other is a periodic calibration to compensate for the variations over supply voltage and temperature changes. The periodic calibration operates in the duration between the servo and the data operation modes in the read channel. As a result, the filter response is robust over process, supply voltage, and temperature variations. The programmable range of the cutoff frequency and the boost are 100–1000 MHz and 0–12 dB, respectively.
Keyword (in Japanese) (See Japanese page) 
(in English) Low pass filter / Continuous time filter / DC offset / Cutoff frequency / Boost / Replica / Hard disk drive /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 214, ICD2009-60, pp. 153-157, Oct. 2009.
Paper # ICD2009-60 
Date of Issue 2009-09-24 (ICD) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ICD2009-60

Conference Information
Committee ICD ITE-IST  
Conference Date 2009-10-01 - 2009-10-02 
Place (in Japanese) (See Japanese page) 
Place (in English) CIC Tokyo (Tamachi) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Analog, Mixed analog and digital, RF, and sensor interface circuitry 
Paper Information
Registration To ICD 
Conference Code 2009-10-ICD-IST 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) 100-1000 MHz Cutoff Frequency, 0-12 dB Boost Programmable Gm-C Filter with Digital Calibration for HDD Read Channel 
Sub Title (in English)  
Keyword(1) Low pass filter  
Keyword(2) Continuous time filter  
Keyword(3) DC offset  
Keyword(4) Cutoff frequency  
Keyword(5) Boost  
Keyword(6) Replica  
Keyword(7) Hard disk drive  
Keyword(8)  
1st Author's Name Takahide Terada  
1st Author's Affiliation Hitachi, Ltd., Central Research Laboratory (Hitachi, Ltd.)
2nd Author's Name Koji Nasu  
2nd Author's Affiliation Renesas Technology Corp. (Renesas Tech Corp.)
3rd Author's Name Taizo Yamawaki  
3rd Author's Affiliation Hitachi, Ltd., Central Research Laboratory (Hitachi, Ltd.)
4th Author's Name Masaru Kokubo  
4th Author's Affiliation Hitachi, Ltd., Central Research Laboratory (Hitachi, Ltd.)
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Speaker Author-1 
Date Time 2009-10-02 17:00:00 
Presentation Time 25 minutes 
Registration for ICD 
Paper # ICD2009-60 
Volume (vol) vol.109 
Number (no) no.214 
Page pp.153-157 
#Pages 5 
Date of Issue 2009-09-24 (ICD) 

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