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Paper Abstract and Keywords
Presentation 2010-01-14 10:25
Deviation from Proportional Relationship Between Emitter Charging Time and Inverse Current of Heterojunction Bipolar Transistors Operating at High Current Density
Masayuki Yamada, Takafumi Uesawa, Yasuyuki Miyamoto, Kazuhito Furuya (Tokyo Inst. of Tech.) ED2009-182 MW2009-165
Abstract (in Japanese) (See Japanese page) 
(in English) We investigated the relationship between the emitter charging time and inverse current of heterojunction bipolar transistors (HBTs) operating at high current density. This relationship appears to be proportional when the current density is low enough, but it deviates from this proportional relationship at a current density of more than a few mega-ampere per square centimeter. This deviation causes an error in the separation of the total delay time into components when assuming the relationship 1/fT = A/I+B, where fT is the cutoff frequency, I is the current, and A and B are constants. This error is more than 30 fs, which is not negligible for ultra-high-speed HBTs.
Keyword (in Japanese) (See Japanese page) 
(in English) Heterojunction Bipolar Transistor (HBT) / Emitter Charging Time / Dynamic Emitter Resistance / Emitter Junction Capacitance / Fermi-Dirac Distribution / High Current Density Operation / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 360, ED2009-182, pp. 43-48, Jan. 2010.
Paper # ED2009-182 
Date of Issue 2010-01-06 (ED, MW) 
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 ED2009-182 MW2009-165

Conference Information
Committee ED MW  
Conference Date 2010-01-13 - 2010-01-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ED 
Conference Code 2010-01-ED-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Deviation from Proportional Relationship Between Emitter Charging Time and Inverse Current of Heterojunction Bipolar Transistors Operating at High Current Density 
Sub Title (in English)  
Keyword(1) Heterojunction Bipolar Transistor (HBT)  
Keyword(2) Emitter Charging Time  
Keyword(3) Dynamic Emitter Resistance  
Keyword(4) Emitter Junction Capacitance  
Keyword(5) Fermi-Dirac Distribution  
Keyword(6) High Current Density Operation  
Keyword(7)  
Keyword(8)  
1st Author's Name Masayuki Yamada  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Takafumi Uesawa  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Yasuyuki Miyamoto  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
4th Author's Name Kazuhito Furuya  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2010-01-14 10:25:00 
Presentation Time 25 minutes 
Registration for ED 
Paper # ED2009-182, MW2009-165 
Volume (vol) vol.109 
Number (no) no.360(ED), no.361(MW) 
Page pp.43-48 
#Pages 6 
Date of Issue 2010-01-06 (ED, MW) 

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