| Presentation | 2010-07-30 Gain and Bandwidth Tunable Multi-band Differential Amplifiers Yasushi ITOH, Kazuyoshi SAKAMOTO, Wei CAO, Keita SAKURAI, Toshihiko MURATA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | An L-band gain and bandwidth tunable low-noise differential amplifier has been developed for the next generation reconfigurable wireless radios. It employs a varactor-tuned base bias circuit for tuning a lower band-edge frequency of the amplifier, a varactor-tuned collector bias circuit for tuning a higher band-edge frequency of the amplifier, an active load for a fine tuning of gain, and a cascode HBT for a coarse tuning of gain. With the use of the varactor-tuned bias circuits, the lower band-edge frequency can be varied from 0.3 to 0.8 GHz for a fixed higher band-edge frequency of 1.7 GHz. On the other hand, the higher band-edge frequency can be varied from 0.7 to 1.7 GHz for a fixed lower band-edge frequency of 0.3 GHz. With the use of an active load and a cascode HBT, a fine tuning range of gain up to 2.8 dB over 1.3 to 1.5 GHz and a coarse tuning range of gain up to 23 dB across 0.7 to 1.5 GHz have been successflully achieved. Since the frequency response including lower and higher band-edge frequencies as well as gain level can be tuned independently, the amplifier is considered to greatly contribute to realizing the next generation reconfigurable wireless transceivers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | microwaves / differential amplifier / tunable gain / tunable bandwidth / SiGe HBT / active load / cascode BJT |
| Paper # | MW2010-60,OPE2010-45 |
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| Conference Information | |
| Committee | MW |
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| Conference Date | 2010/7/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Microwaves (MW) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Gain and Bandwidth Tunable Multi-band Differential Amplifiers |
| Sub Title (in English) | |
| Keyword(1) | microwaves |
| Keyword(2) | differential amplifier |
| Keyword(3) | tunable gain |
| Keyword(4) | tunable bandwidth |
| Keyword(5) | SiGe HBT |
| Keyword(6) | active load |
| Keyword(7) | cascode BJT |
| 1st Author's Name | Yasushi ITOH |
| 1st Author's Affiliation | Electrical and Information Engineering, Graduate School, Shonan Institute of Technology() |
| 2nd Author's Name | Kazuyoshi SAKAMOTO |
| 2nd Author's Affiliation | Electrical and Information Engineering, Graduate School, Shonan Institute of Technology |
| 3rd Author's Name | Wei CAO |
| 3rd Author's Affiliation | Electrical and Information Engineering, Graduate School, Shonan Institute of Technology |
| 4th Author's Name | Keita SAKURAI |
| 4th Author's Affiliation | Electrical and Information Engineering, Graduate School, Shonan Institute of Technology |
| 5th Author's Name | Toshihiko MURATA |
| 5th Author's Affiliation | Electrical and Information Engineering, Graduate School, Shonan Institute of Technology |
| Date | 2010-07-30 |
| Paper # | MW2010-60,OPE2010-45 |
| Volume (vol) | vol.110 |
| Number (no) | 155 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |