A Multimode Transmitter in 0.13 $\mu\hbox{m}$ CMOS Using Direct-Digital RF Modulator

@article{Eloranta2007AMT,
  title={A Multimode Transmitter in 0.13 \$\mu\hbox\{m\}\$  CMOS Using Direct-Digital RF Modulator},
  author={P. Eloranta and Pauli Seppinen and Sami Kallioinen and Tuomas Saarela and Aarno Parssinen},
  journal={IEEE Journal of Solid-State Circuits},
  year={2007},
  volume={42},
  pages={2774-2784}
}
This paper presents a system-independent transmitter architecture based on a direct-digital RF-modulator which combines the D/A conversion, up-conversion, unwanted sideband rejection, power control, and part of the digital image-rejection filtering into a single mixed-signal circuit block. The multimode capability of the architecture is demonstrated with WCDMA, EDGE, and WLAN system requirements. The modulator achieves 90 dB of power control range and with an external power amplifier module… CONTINUE READING
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