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Paper Abstract and Keywords
Presentation 2022-01-27 13:15
An Inductor-Less Broadband Active Balun with Imbalance Correction and Active Peaking
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano (TUS) ED2021-62 MW2021-104
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents an area-efficient broadband active balun with low gain error and phase error. An ideal balun has a differential output with the same amplitude and a phase difference of 180°. However, process variations and parasitic elements degrade the gain and phase errors at high frequencies. In a previous study, a method called MPCCT (Magnitude and Phase Concurrent Correction Technique) was proposed to reduce the errors by taking the difference of differential outputs using a feedback circuit. In this study, we analyzed the MPCCT in detail, and a capacitor we added improves the common-mode rejection ratio at high frequencies. Besides, we revealed that the feedback loops in the MPCCT are available for active peaking, and the additional capacitor also improves the high-frequency gain. In addition, we devised a bias circuit configuration using a current mirror for the input of the MPCCT to obtain a good current balance without tuning. An active balun using the proposed technique was fabricated using a 180 nm CMOS process and evaluated by S-parameter measurements. The developed balun demonstrates a bandwidth of 8.0 GHz, and the gain and phase errors within the bandwidth are less than 0.33 dB and 1.36°, respectively, including the process variation. The core area is 0.0058 square millimeters, which is smaller than previous studies.
Keyword (in Japanese) (See Japanese page) 
(in English) Baluns / CMOS integrated circuits / Fiber-optic communications / MPCCT / Active peaking / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 361, MW2021-104, pp. 1-6, Jan. 2022.
Paper # MW2021-104 
Date of Issue 2022-01-20 (ED, MW) 
ISSN 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 ED2021-62 MW2021-104

Conference Information
Committee ED MW  
Conference Date 2022-01-27 - 2022-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MW 
Conference Code 2022-01-ED-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Inductor-Less Broadband Active Balun with Imbalance Correction and Active Peaking 
Sub Title (in English)  
Keyword(1) Baluns  
Keyword(2) CMOS integrated circuits  
Keyword(3) Fiber-optic communications  
Keyword(4) MPCCT  
Keyword(5) Active peaking  
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1st Author's Name Keisuke Kawahara  
1st Author's Affiliation Tokyo University of Science (TUS)
2nd Author's Name Yohtaro Umeda  
2nd Author's Affiliation Tokyo University of Science (TUS)
3rd Author's Name Kyoya Takano  
3rd Author's Affiliation Tokyo University of Science (TUS)
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Speaker Author-1 
Date Time 2022-01-27 13:15:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # ED2021-62, MW2021-104 
Volume (vol) vol.121 
Number (no) no.360(ED), no.361(MW) 
Page pp.1-6 
#Pages 6 
Date of Issue 2022-01-20 (ED, MW) 

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