A 2-GHz analog-to-digital delta-sigma modulator for CDMA receivers with 79-dB signal-to-noise ratio in 1.23-MHz bandwidth

This paper presents the design of a second-order single-bit analog-to-digital continuous-time delta-sigma modulator (CT-/spl Delta//spl Sigma/M) that can be used in wireless CDMA receivers. The CT-/spl Delta//spl Sigma/M samples at 2 GHz, consumes 18 mW at 1.8 V and has a 79-dB signal-to-noise ratio...

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Veröffentlicht in:	IEEE journal of solid-state circuits 2004-11, Vol.39 (11), p.1819-1828
Hauptverfasser:	Dagher, E.H., Stubberud, P.A., Masenten, W.K., Conta, M., Dinh, T.V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analog to digital conversion Applied sciences Bandwidth Circuit properties Circuits CMOS Code division multiple access Delta modulation Digital communication Digital filters Dynamic range Electric, optical and optoelectronic circuits Electronic circuits Electronics Exact sciences and technology Filtering Integrated circuits Integrated circuits by function (including memories and processors) Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Modulators Multiaccess communication Receivers Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Signal convertors Signal to noise ratio Specifications
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Beschreibung
Zusammenfassung:	This paper presents the design of a second-order single-bit analog-to-digital continuous-time delta-sigma modulator (CT-/spl Delta//spl Sigma/M) that can be used in wireless CDMA receivers. The CT-/spl Delta//spl Sigma/M samples at 2 GHz, consumes 18 mW at 1.8 V and has a 79-dB signal-to-noise ratio (SNR) over a 1.23-MHz bandwidth. The CT-/spl Delta//spl Sigma/M was fabricated in a 0.18-/spl mu/m 1-poly 6-metal, CMOS technology and has an active area of approximately 0.892 mm/sup 2/. The /spl Delta//spl Sigma/M's critical performance specifications are derived from the CDMA receiver specifications.
ISSN:	0018-9200 1558-173X
DOI:	10.1109/JSSC.2004.835831