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A 10-bit wide-band CMOS direct digital RF amplitude modulator

Yijun, Zhou LU and Yuan, Jiren LU (2003) In IEEE Journal of Solid-State Circuits 38(7). p.1182-1188
Abstract
This paper describes a low-distortion wide-band CMOS direct digital RF amplitude modulator, which uses a 10-bit linear interpolation current-steering digital-to-analog converter (DAC) and a Gilbert-cell-based mixer to generate an amplitude modulated RF signal directly. The linear interpolation increases the attenuation of the DAC's image components. The reconstruction filter is, therefore, eliminated. The DAC's differential current signals are directly sent to the mixer, which improves the linearity of the modulated RF signal. Thus, the RF transmitter structure is simplified, and the low distortion is achieved. This modulator is suitable for system-on-chip (SOC) design and is easily scalable. The chip was fabricated in a 0.35-/spl mu/m... (More)
This paper describes a low-distortion wide-band CMOS direct digital RF amplitude modulator, which uses a 10-bit linear interpolation current-steering digital-to-analog converter (DAC) and a Gilbert-cell-based mixer to generate an amplitude modulated RF signal directly. The linear interpolation increases the attenuation of the DAC's image components. The reconstruction filter is, therefore, eliminated. The DAC's differential current signals are directly sent to the mixer, which improves the linearity of the modulated RF signal. Thus, the RF transmitter structure is simplified, and the low distortion is achieved. This modulator is suitable for system-on-chip (SOC) design and is easily scalable. The chip was fabricated in a 0.35-/spl mu/m 3.3-V double-poly triple-metal CMOS process. The core size of the chip is 0.52 mm/spl times/0.68 mm. With a 3.3-MHz modulation signal, a 50-MHz clock, and a 1-GHz carrier, the distortion components are below -53.81 dBc, and the attenuation of the image signal is 47.45 dB. The output power is -6.5 dBm, and the total power consumption is 159.8 mW. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
radio-frequency integrated circuit, CMOS integrated circuit, amplitude modulation, digital-to-analog, converter (DAC), (RFIC), interpolation
in
IEEE Journal of Solid-State Circuits
volume
38
issue
7
pages
1182 - 1188
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000183822600012
  • scopus:0037480246
ISSN
0018-9200
DOI
language
English
LU publication?
yes
id
3867c643-6a1d-4abe-96d7-591839f1a49b (old id 1049667)
date added to LUP
2008-03-20 11:31:24
date last changed
2018-05-29 10:33:14
@article{3867c643-6a1d-4abe-96d7-591839f1a49b,
  abstract     = {This paper describes a low-distortion wide-band CMOS direct digital RF amplitude modulator, which uses a 10-bit linear interpolation current-steering digital-to-analog converter (DAC) and a Gilbert-cell-based mixer to generate an amplitude modulated RF signal directly. The linear interpolation increases the attenuation of the DAC's image components. The reconstruction filter is, therefore, eliminated. The DAC's differential current signals are directly sent to the mixer, which improves the linearity of the modulated RF signal. Thus, the RF transmitter structure is simplified, and the low distortion is achieved. This modulator is suitable for system-on-chip (SOC) design and is easily scalable. The chip was fabricated in a 0.35-/spl mu/m 3.3-V double-poly triple-metal CMOS process. The core size of the chip is 0.52 mm/spl times/0.68 mm. With a 3.3-MHz modulation signal, a 50-MHz clock, and a 1-GHz carrier, the distortion components are below -53.81 dBc, and the attenuation of the image signal is 47.45 dB. The output power is -6.5 dBm, and the total power consumption is 159.8 mW.},
  author       = {Yijun, Zhou and Yuan, Jiren},
  issn         = {0018-9200},
  keyword      = {radio-frequency integrated circuit,CMOS integrated circuit,amplitude modulation,digital-to-analog,converter (DAC),(RFIC),interpolation},
  language     = {eng},
  number       = {7},
  pages        = {1182--1188},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Journal of Solid-State Circuits},
  title        = {A 10-bit wide-band CMOS direct digital RF amplitude modulator},
  url          = {http://dx.doi.org/},
  volume       = {38},
  year         = {2003},
}