| Presentation | 2013-07-18 2 GHz-Band CMOS Direct Digital RF Modulator Using Oversampling Current-Mode DAC Osamu WADA, Suguru KAMEDA, Noriharu SUEMATSU, Tadashi TAKAGI, Kazuo TSUBOUCHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have proposed a direct digital RF modulator which consists of a higher order oversampling current-mode differential DAC and LO switches attached to the output of the current-mode DAC. To reduce the spurious emission and to satisfy the spectrum mask of W-CDMA, the bit number and sampling frequency (number of oversampling orders) were designed. The modulator IC (8 bit, 100 MSample/s (25 times oversampling)) has been fabricated in 90-nm CMOS process and it achieves SNR of 57.3 dB, IM_3 of -39.6 dBc and IM_5 of -52.5 dBc. The spurious free (<-50 dBc/100 kHz) frequency range of 197 MHz is also obtained. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Digital RF / Modulator / DAC / CMOS / Direct Conversion / Oversampling / RFIC |
| Paper # | MW2013-63,OPE2013-32,EST2013-27,MWP2013-22 |
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| Conference Information | |
| Committee | OPE |
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| Conference Date | 2013/7/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | 2 GHz-Band CMOS Direct Digital RF Modulator Using Oversampling Current-Mode DAC |
| Sub Title (in English) | |
| Keyword(1) | Digital RF |
| Keyword(2) | Modulator |
| Keyword(3) | DAC |
| Keyword(4) | CMOS |
| Keyword(5) | Direct Conversion |
| Keyword(6) | Oversampling |
| Keyword(7) | RFIC |
| 1st Author's Name | Osamu WADA |
| 1st Author's Affiliation | Research Institute of Electrical Communication, Tohoku University() |
| 2nd Author's Name | Suguru KAMEDA |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 3rd Author's Name | Noriharu SUEMATSU |
| 3rd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 4th Author's Name | Tadashi TAKAGI |
| 4th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 5th Author's Name | Kazuo TSUBOUCHI |
| 5th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 2013-07-18 |
| Paper # | MW2013-63,OPE2013-32,EST2013-27,MWP2013-22 |
| Volume (vol) | vol.113 |
| Number (no) | 142 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |