| Citation: |
Qiu Dong, Yi Ting, Hong Zhiliang. A low-power triple-mode sigma--delta DAC for reconfigurable (WCDMA/TD-SCDMA/GSM) transmitters[J]. Journal of Semiconductors, 2011, 32(2): 025005. doi: 10.1088/1674-4926/32/2/025005
Qiu D, Yi T, Hong Z L. A low-power triple-mode sigma--delta DAC for reconfigurable (WCDMA/TD-SCDMA/GSM) transmitters[J]. J. Semicond., 2011, 32(2): 025005. doi: 10.1088/1674-4926/32/2/025005.
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A low-power triple-mode sigma--delta DAC for reconfigurable (WCDMA/TD-SCDMA/GSM) transmitters
doi: 10.1088/1674-4926/32/2/025005
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Abstract
A sigma--delta (Σ Δ) DAC with channel filtering for multi-standard wireless transmitters used in the software-defined-radio (SDR) system is presented. The conversion frequency, transfer function of the digital filter and the Σ Δ modulator, word-length of the IDAC and cut-off frequency of the analog reconstruction filter can be digitally programmed to satisfy specifications of WCDMA, TD-SCDMA and GSM standards. The Σ Δ DAC fabricated in SMIC 0.13-μm CMOS process occupies a die area of 0.72 mm2, while consuming 5.52/4.82/3.04 mW in WCDMA/TD-SCDMA/GSM mode from a single 1.2-V supply voltage. The measured SFDR is 62.8/60.1/75.5 dB for WCDMA/TD-SCDMA/GSM mode, respectively.-
Keywords:
- Σ Δ digital-to-analog converter
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