A low distortion wide band CMOS direct digital RF amplitude modulator

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

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 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

Details

Authors
  • Zhou Yijun
  • Jiren Yuan
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • 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
Original languageEnglish
Title of host publicationESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
PublisherUniv. Bologna
Pages775-778
ISBN (Print)88-900847-9-0
Publication statusPublished - 2002
Publication categoryResearch
Peer-reviewedYes
EventESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference - Firenze, Italy
Duration: 2002 Sep 242002 Sep 26

Conference

ConferenceESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
Country/TerritoryItaly
CityFirenze
Period2002/09/242002/09/26