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Paper Abstract and Keywords
Presentation 2013-07-18 11:00
2GHz-Band CMOS Direct Digital RF Modulator Using Oversampling Current-Mode DAC
Osamu Wada, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi (Tohoku Univ.) MW2013-63 OPE2013-32 EST2013-27 MWP2013-22 Link to ES Tech. Rep. Archives: MW2013-63 OPE2013-32 EST2013-27 MWP2013-22
Abstract (in Japanese) (See Japanese page) 
(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, IM3 of -39.6 dBc and IM5 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) 
(in English) Digital RF / Modulator / DAC / CMOS / Direct Conversion / Oversampling / RFIC /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 141, MW2013-63, pp. 97-102, July 2013.
Paper # MW2013-63 
Date of Issue 2013-07-11 (MW, OPE, EST, MWP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Download PDF MW2013-63 OPE2013-32 EST2013-27 MWP2013-22 Link to ES Tech. Rep. Archives: MW2013-63 OPE2013-32 EST2013-27 MWP2013-22

Conference Information
Committee EST MWP OPE MW EMT IEE-EMT  
Conference Date 2013-07-18 - 2013-07-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Wakkanai Synthesis Cultural Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave photonic technology etc. 
Paper Information
Registration To MW 
Conference Code 2013-07-EST-MWP-OPE-MW-EMT-EMT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) 2GHz-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  
Keyword(8)  
1st Author's Name Osamu Wada  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Suguru Kameda  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Noriharu Suematsu  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Tadashi Takagi  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Kazuo Tsubouchi  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2013-07-18 11:00:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2013-63, OPE2013-32, EST2013-27, MWP2013-22 
Volume (vol) vol.113 
Number (no) no.141(MW), no.142(OPE), no.143(EST), no.144(MWP) 
Page pp.97-102 
#Pages
Date of Issue 2013-07-11 (MW, OPE, EST, MWP) 


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