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A low distortion wide band CMOS direct digital RF amplitude modulator

Författare:
Publiceringsår: 2002
Språk: Engelska
Sidor: 775-778
Publikation/Tidskrift/Serie: ESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
Dokumenttyp: Konferensbidrag
Förlag: Univ. Bologna

Sammanfattning

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 low pass filter (LPF) is therefore eliminated, and the RF transmitter structure is simplified. This modulator is suitable for system-on-chip design. The chip has been fabricated in a 0.35 μm, 3.3 V digital CMOS process. When the transmission signal is at 3 MHz, the distortion components are below -54 dBc at 800 MHz and -49 dBc at 1.2 GHz, respectively. The image signals are below -45 dBc when the transmission signal is 5.2 MHz

Disputation

Nyckelord

  • Technology and Engineering
  • amplitude modulated RF signal
  • DAC image components
  • low pass filter elimination
  • system-on-chip design suitability
  • digital CMOS process
  • distortion components
  • transmission signal
  • image signals
  • RF transmitter structure
  • 3.3 V
  • 0.35 micron
  • 1.2 GHz
  • 3 MHz
  • 800 MHz
  • 5.2 MHz
  • Gilbert cell based mixer
  • low distortion wide band CMOS direct digital RF amplitude modulator
  • linear interpolation current steering digital to analog converter

Övrigt

ESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
2002-09-24/2002-09-26
Firenze, Italy
Published
Yes
  • ISBN: 88-900847-9-0

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