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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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 |
Date of Issue |
Conference Information | |
Committee | EST |
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Conference Date | 2013/7/11(1days) |
Place (in Japanese) | (See Japanese page) |
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Topics (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Electronic Simulation Technology (EST) |
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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) | 143 |
Page | pp.pp.- |
#Pages | 6 |
Date of Issue |