| Presentation | 2022-01-27 An Inductor-Less Broadband Active Balun with Imbalance Correction and Active Peaking Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Baluns / CMOS integrated circuits / Fiber-optic communications / MPCCT / Active peaking |
| Paper # | ED2021-62,MW2021-104 |
| Date of Issue | 2022-01-20 (ED, MW) |
| Conference Information | |
| Committee | ED / MW |
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| Conference Date | 2022/1/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Hiroki Fujishiro(Tokyo Univ. of Science) / Noriharu Suematsu(Tohoku Univ.) |
| Vice Chair | Seiya Sakai(Hokkaido Univ.) / Tadashi Kawai(Univ. of Hyogo) / Kensuke Okubo(Okayama Prefectural Univ.) / Hideyuki Nakamizo(Mitsubishi Electric) |
| Secretary | Seiya Sakai(Fjitsu Lab.) / Tadashi Kawai(NTT) / Kensuke Okubo(Saitama Univ.) / Hideyuki Nakamizo(Toshiba) |
| Assistant | Ryota Isonoi(SCIOCS) / Yoshitugu Yamamoto(Mitsubishi Electric) / Naoki Hasegawa(Softbank) / Kosuke Katayama(NIT, Tokuyama) |
| Paper Information | |
| Registration To | Technical Committee on Electron Devices / Technical Committee on Microwaves |
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| Language | JPN |
| 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 |
| 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) |
| Date | 2022-01-27 |
| Paper # | ED2021-62,MW2021-104 |
| Volume (vol) | vol.121 |
| Number (no) | ED-360,MW-361 |
| Page | pp.pp.1-6(ED), pp.1-6(MW), |
| #Pages | 6 |
| Date of Issue | 2022-01-20 (ED, MW) |