Transconductance-tunable radio-frequency digital-to-analog converter for dual-mode frequency translating ΔΣMs

Author

Dongmin Kang ; So Young Kang ; Hi Yuen Song ; Hyunseok Choi ; Inn Yeal Oh ; Chul Soon Park

Author_Institution

Dept. of Electr. Eng., KAIST, Daejeon, South Korea

fYear

2013

fDate

5-8 Nov. 2013

Firstpage

494

Lastpage

496

Abstract

In this paper, a Transconductance(gm)-tunable Radio-Frequency Digital-to-Analog converter (RFDAC) that used in Frequency Translating Delta-Sigma Modulator (FTDSM) is presented. The proposed RFDAC can support dualmode operation for FTDSM. To guarantee the linear gm control, constant current density technique is used. To verify the RFDAC, the prototype of 4th order FTDSM is fabricated using a 90 nm CMOS process and measured in the laboratory. The measured SNDR for 800 MHz/1.6 GHz dual mode operation was 43 dB and 44 dB for each.

Keywords

CMOS integrated circuits; current density; delta-sigma modulation; CMOS process; FTDSM; RFDAC; constant current density; dual mode operation; dual-mode frequency translating ΔΣM; frequency 1.6 GHz; frequency 800 MHz; frequency translating delta-sigma modulator; linear gm control; radiofrequency digital-to-analog converter; size 90 nm; transconductance-tunable converter; Band-pass filters; Baseband; Frequency modulation; Prototypes; Radio frequency; Receivers; FTDSM; RFDAC; SDR; constant current density; dual-mode;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2013 Asia-Pacific

Conference_Location

Seoul

Type

conf

DOI

10.1109/APMC.2013.6694842

Filename

6694842