Systematic analysis of the impact of mixing locality on Mixing-DAC linearity for multicarrier GSM

E. Bechthum, G.I. Radulov, J. Briaire, G. Geelen, A.H.M. Roermund, van

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

10 Citations (Scopus)
238 Downloads (Pure)

Abstract

In an RF transmitter, the function of the mixer and the DAC can be combined in a single block: the Mixing-DAC. For the generation of multicarrier GSM signals in a basestation, high dynamic linearity is required, i.e. SFDR>85dBc, at high output signal frequency, i.e. ƒout ˜ 4GHz. This represents a challenge which cannot be addressed efficiently by current available hardware or state-of-the-art published solutions. Mixing locality indicates if the mixing operation is executed locally in each DAC unit cell or globally on the combined DAC output signal. The mixing locality is identified as one of the most important aspects of the Mixing-DAC architecture with respect to linearity. Simulations of a current steering Mixing-DAC show that local mixing with a local output cascode can result in the highest linearity, i.e. IMD3<-88dBc at ƒout=4GHz.
Original languageEnglish
Title of host publicationPresentation at the 2012 IEEE International Symposium on Circuits and Systems (ISCAS 2012), May 20-23, 2012, Seoul, Korea
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages241-244
ISBN (Print)978-1-4673-0219-7
Publication statusPublished - 2012
Event2012 IEEE International Symposium on Circuits and Systems (ISCAS 2012) - Seoul, Korea, Republic of
Duration: 20 May 201223 May 2012

Conference

Conference2012 IEEE International Symposium on Circuits and Systems (ISCAS 2012)
Abbreviated titleISCAS 2012
Country/TerritoryKorea, Republic of
CitySeoul
Period20/05/1223/05/12

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