| Presentation | 2008-07-25 Digitally-Controlled, Variable Gain Differential Amplifiers Using Bridged-T Attenuator Circuits Kazuyoshi SAKAMOTO, Masaki SHIRATA, Kenji NAKAMURA, Yasushi ITOH, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | An L-band digitally-controlled, variable gain differential amplifier (VGA) is presented. It employs a bridged-T attenuator circuit between emitters of the differential pair and achieves a gain variation of 1dB, 2dB, 4dB, and 8dB by switching an attenuation level. By cascading the 4-bit VGAs, the maximum gain variation of 16dB with 1dB step can be realized. The implemented 0.35μm Site HBT digitally-controlled VGA demonstrates a gain variation from-7.4dB to +9.1 dB with 1dB step at 1GHz. The input and output return losses are better than 13dB and 9.5dB, respectively. The best noise figure was 3.3dB. The measured IIP_3 are -7dBm with V_ |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Differential Amplifier / Variable Gain / SiGe HBT / Microwave / Bridged-T / Attenuator |
| Paper # | MW2008-74,OPE2008-57 |
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| Conference Information | |
| Committee | OPE |
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| Conference Date | 2008/7/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Optoelectronics (OPE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Digitally-Controlled, Variable Gain Differential Amplifiers Using Bridged-T Attenuator Circuits |
| Sub Title (in English) | |
| Keyword(1) | Differential Amplifier |
| Keyword(2) | Variable Gain |
| Keyword(3) | SiGe HBT |
| Keyword(4) | Microwave |
| Keyword(5) | Bridged-T |
| Keyword(6) | Attenuator |
| 1st Author's Name | Kazuyoshi SAKAMOTO |
| 1st Author's Affiliation | Department of Electrical and Electronic Engineering, Shonan Institute of Technology() |
| 2nd Author's Name | Masaki SHIRATA |
| 2nd Author's Affiliation | Department of Electrical and Electronic Engineering, Shonan Institute of Technology |
| 3rd Author's Name | Kenji NAKAMURA |
| 3rd Author's Affiliation | Department of Electrical and Electronic Engineering, Shonan Institute of Technology |
| 4th Author's Name | Yasushi ITOH |
| 4th Author's Affiliation | Department of Electrical and Electronic Engineering, Shonan Institute of Technology |
| Date | 2008-07-25 |
| Paper # | MW2008-74,OPE2008-57 |
| Volume (vol) | vol.108 |
| Number (no) | 155 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |