A Baseband Codec for Digital Cellular Telephony

Kadaba R. Lakshmikumar, David W. Green, K. Krishnaswamy, King Hon Lau, Oscar E. Agazzi, Jeffrey R. Barner, Reza S. Shariatdoust, Gene A. Wilson, Tuan Le, M. R. Dwarakanath, Jacques G. Ruch, Jit Kumar , Timo Ali-Vehmas, Jouko J. Junkkari , Lauri Siren

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

This paper describes the design of a baseband codec for European and North American digital cellular telephone applications. By integrating all the data conversion circuitry, this chip offers a low-cost, low-power solution to baseband signal processing and control functions. The receive section has two paths to process the in-phase and quadrature-phase components of the signal. Each path consists of a programmable gain amplifier (PGA) and a 10-b sigma—delta A/D converter. Two 8-b D/A converters generate the in-phase and quadrature-phase components of the transmit signal. A 9-b DAC and a 10-b DAC are provided to perform auxiliary control functions. The chip is fabricated using a 0.9-μm CMOS technology and has an area of 21 mm2. The average power dissipation is 85 mW.

Original languageEnglish
Pages (from-to)1951-1958
Number of pages8
JournalIEEE Journal of Solid-State Circuits
Volume26
Issue number12
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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