| Presentation | 2021-12-16 Analysis and Design of a Differential Distributed Amplifier with Coupled Inductors Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, Shinsuke Hara, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a differential distributed amplifier with coupled inductors. Broadband and multi-level signaling are used in recent fiber-optic communications, which required broadband amplifiers. Differential distributed amplifiers with coupled inductors realize compact chip-areas. However, the mutual capacitance of the inductors causes the gain ripple and group delay variation. This research analyses the artificial transmission lines in the differential distributed amplifiers as ideal differential transmission lines. The dimensions of the coupled inductors are determined by numerical optimization based on the analytical solution. The amplifier is implemented in a 180 nm CMOS technology, and performance is assessed by measurement. The amplifiers demonstrated a core area of 0.27 mm2, which is smaller than the previous work. The gain and bandwidth are 5.1 dB and 18.5 GHz, respectively. The group delay variation below 15 GHz is only ±2.7 ps. Besides, clear eye opening was observed in 30 Gbps NRZ and PAM4. The RMS jitter in the 30 Gbps NRZ transmission is 0.42 ps. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Distributed amplifiers / Coupled inductors / CMOS integrated circuits / Fiber-optic communications |
| Paper # | MW2021-92 |
| Date of Issue | 2021-12-09 (MW) |
| Conference Information | |
| Committee | MW |
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| Conference Date | 2021/12/16(2days) |
| 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 |
| Chair | Noriharu Suematsu(Tohoku Univ.) |
| Vice Chair | Tadashi Kawai(Univ. of Hyogo) / Kensuke Okubo(Okayama Prefectural Univ.) / Hideyuki Nakamizo(Mitsubishi Electric) |
| Secretary | Tadashi Kawai(Saitama Univ.) / Kensuke Okubo(Toshiba) / Hideyuki Nakamizo |
| Assistant | Naoki Hasegawa(Softbank) / Kosuke Katayama(NIT, Tokuyama College) |
| Paper Information | |
| Registration To | 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) | Analysis and Design of a Differential Distributed Amplifier with Coupled Inductors |
| Sub Title (in English) | |
| Keyword(1) | Distributed amplifiers |
| Keyword(2) | Coupled inductors |
| Keyword(3) | CMOS integrated circuits |
| Keyword(4) | Fiber-optic communications |
| 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) |
| 4th Author's Name | Shinsuke Hara |
| 4th Author's Affiliation | National Institute of Information and Communication Technology(NICT) |
| Date | 2021-12-16 |
| Paper # | MW2021-92 |
| Volume (vol) | vol.121 |
| Number (no) | MW-303 |
| Page | pp.pp.43-48(MW), |
| #Pages | 6 |
| Date of Issue | 2021-12-09 (MW) |