| Presentation | 2015-11-19 Bandwidth Enhancement of Negative Capacitance Generated by Operational Amplifier Based Negative Impedance Converter Kenichi Matsumoto, Shoji Yamanaka, Yasushi Horii, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have succeeded to generate non-Foster reactance (negative capacitance) by using an operational amplifier OPA690 (Texas Instruments, GB product of 500MHz), but only in a frequency range from 40 MHz to 160 MHz so far. This report indicates that the upper limit of non-Foster frequency, 160 MHz, is determined by undesired inductance of circuit patterns on PCB, and proposes a method to suppress the influence of the pattern inductance by utilizing the differential behavior of operational amplifiers. In the demonstration, a negative capacitance of about -75 pF±10% is generated successfully from 64 MHz to 180 MHz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Negative impedance converter / NIC / non-Foster / Negative capacitance |
| Paper # | MW2015-127 |
| Date of Issue | 2015-11-12 (MW) |
| Conference Information | |
| Committee | MW |
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| Conference Date | 2015/11/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Univ. of the Ryukyus |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Technologies |
| Chair | Yohei Ishikawa(Kyoto Univ.) |
| Vice Chair | Masashi Nakatsugawa(NTT) / Takao Kuki(Kokushikan Univ.) / Kenjiro Nishikawa(Kagoshima Univ.) |
| Secretary | Masashi Nakatsugawa(NTT) / Takao Kuki(Panasonic) / Kenjiro Nishikawa |
| Assistant | Ryo Ishikawa(Univ. of Electro-Comm.) / Naoto Sekiya(Univ. of Yamanashi) |
| 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) | Bandwidth Enhancement of Negative Capacitance Generated by Operational Amplifier Based Negative Impedance Converter |
| Sub Title (in English) | |
| Keyword(1) | Negative impedance converter |
| Keyword(2) | NIC |
| Keyword(3) | non-Foster |
| Keyword(4) | Negative capacitance |
| 1st Author's Name | Kenichi Matsumoto |
| 1st Author's Affiliation | Kansai University(Kansai Univ) |
| 2nd Author's Name | Shoji Yamanaka |
| 2nd Author's Affiliation | Kansai University(Kansai Univ) |
| 3rd Author's Name | Yasushi Horii |
| 3rd Author's Affiliation | Kansai University(Kansai Univ) |
| Date | 2015-11-19 |
| Paper # | MW2015-127 |
| Volume (vol) | vol.115 |
| Number (no) | MW-314 |
| Page | pp.pp.41-46(MW), |
| #Pages | 6 |
| Date of Issue | 2015-11-12 (MW) |