| Presentation | 1997/7/25 A GaAs Monolithic Bipolar Variable Attenuator with Improved Control Linearity : A key circuit to degital-control microwave signal processing Y. SUZUKI, T. OHIRA, H. OGAWA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a novel circuit topology to improve control linearity in wide range variable attenuators. Five pairs of cold MESFETs are employed as variable devices. They have different gate width and their drain and source are connected in parallel to the quadrature hybrid. The gate of each MESFET is driven proportionally by the external dc control voltage. The gate width and voltage ratio of each MESFET is optimized in circuit design to achieve high linearity. A prototype bipolar variable attenuator is fabricated using GaAs MMIC process. The control performance is measured in the S band frequency range. Sensitivity deviation within +/- 5 % is successfully observed for over 50 % of the full varistor control range. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Microwave Signal Processing / Variable Attenuator / Control Linearity / MMIC |
| Paper # | CQ97-29 |
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| Conference Information | |
| Committee | CQ |
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| Conference Date | 1997/7/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
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| Paper Information | |
| Registration To | Communication Quality (CQ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A GaAs Monolithic Bipolar Variable Attenuator with Improved Control Linearity : A key circuit to degital-control microwave signal processing |
| Sub Title (in English) | |
| Keyword(1) | Microwave Signal Processing |
| Keyword(2) | Variable Attenuator |
| Keyword(3) | Control Linearity |
| Keyword(4) | MMIC |
| 1st Author's Name | Y. SUZUKI |
| 1st Author's Affiliation | NTT Wireless Systems Laboratories() |
| 2nd Author's Name | T. OHIRA |
| 2nd Author's Affiliation | NTT Wireless Systems Laboratories |
| 3rd Author's Name | H. OGAWA |
| 3rd Author's Affiliation | NTT Wireless Systems Laboratories |
| Date | 1997/7/25 |
| Paper # | CQ97-29 |
| Volume (vol) | vol.97 |
| Number (no) | 190 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |