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Paper Abstract and Keywords
Presentation 2021-12-16 15:40
Series-Series Feedback D-band CMOS Amplifier using a Radial Stub for Source Grounding
Taiki Machii (Tohoku Univ.), Mizuki Motoyoshi (SIST), Suguru Kameda (Hiroshima Univ.), Noriharu Suematsu (Tohoku Univ.) MW2021-93 Link to ES Tech. Rep. Archives: MW2021-93
Abstract (in Japanese) (See Japanese page) 
(in English) Positive feedback is effective to improve the gain since sufficient gain cannot be achieved with over-100 GHz CMOS amplifiers. In conventional positive feedback, cross-coupling with differential configuration is widely used. However, the differential configuration has some problems such as doubling the power consumption and chip area. In this paper, we studied the application of series-series feedback (SSF) to D-band CMOS amplifiers.
First, the principle of gain boost by SSF is formally clarified and its design conditions are presented. Next, a new gain boost topology inserting a radial stub and a short stub in the source of FET is proposed. It is applicable SSF to D-band CMOS amplifiers. A 130 GHz SSF amplifier was fabricated in a 65 nm bulk CMOS process. The measured gain was 1.6 dB higher than a conventional amplifier. It shows the proposed method is effective for gain boost.
Keyword (in Japanese) (See Japanese page) 
(in English) CMOS / Amplifier / Positive feedback / Radial stub / Millimeter-wave / gain boost / D-band /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 303, MW2021-93, pp. 49-54, Dec. 2021.
Paper # MW2021-93 
Date of Issue 2021-12-09 (MW) 
ISSN Online edition: ISSN 2432-6380
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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 MW2021-93 Link to ES Tech. Rep. Archives: MW2021-93

Conference Information
Committee MW  
Conference Date 2021-12-16 - 2021-12-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Kawasaki City Industrial Promotion Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave/Presentation and Award Ceremony of SDC 
Paper Information
Registration To MW 
Conference Code 2021-12-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Series-Series Feedback D-band CMOS Amplifier using a Radial Stub for Source Grounding 
Sub Title (in English)  
Keyword(1) CMOS  
Keyword(2) Amplifier  
Keyword(3) Positive feedback  
Keyword(4) Radial stub  
Keyword(5) Millimeter-wave  
Keyword(6) gain boost  
Keyword(7) D-band  
Keyword(8)  
1st Author's Name Taiki Machii  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Mizuki Motoyoshi  
2nd Author's Affiliation Shizuoka Institute of Science and Technology (SIST)
3rd Author's Name Suguru Kameda  
3rd Author's Affiliation Hiroshima University (Hiroshima Univ.)
4th Author's Name Noriharu Suematsu  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2021-12-16 15:40:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2021-93 
Volume (vol) vol.121 
Number (no) no.303 
Page pp.49-54 
#Pages
Date of Issue 2021-12-09 (MW) 


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