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A 100dB SFDR 0.5V pk-pk band-pass DAC implemented on a low voltage CMOS process
Mullane, Brendan; O'Brien, Vincent
Direct Digital Synthesis (DDS) systems generate fine frequency resolution signals over a broad spectrum that are used in a wide variety of applications such as multi-mode RF, communications, measurements and test. A high performance DDS band-pass Digital to Analog Converter (DAC) architecture and implementation is presented that delivers high spectral purity over a narrow-band response. The low power D/A Converter is portable to standard CMOS processes and designed to achieve over 100dB narrow-band SFDR performance using Sigma-Delta (ΣΔ) modulation and multi-bit current steering techniques. A 3rd order digital ΣΔ modulator is combined with a 4th order digital Dynamic Element Matching (DEM) block to shape the noise while calibrating for process mismatch variations. A low silicon area output stage is used to deliver a high performance specification. ACCEPTED Peer reviewed
Keyword(s): direct digital synthesis; digital to Analog converter; band-pass DAC; static mismatch; noise-shaping
Publication Date:
2012
Type: Book chapter
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Funder(s): Enterprise Ireland
Citation(s): VLSI-SoC: Advanced Research for Systems on Chip. Salvador Mir, Chi-Ying Tsui, Ricardo Reis, Oliver C. S. Choy (eds);pp. 144-157
http://dx.doi.org/10.1007/978-3-642-32770-4
Publisher(s): Springer
First Indexed: 2017-04-01 06:00:47 Last Updated: 2017-04-01 06:00:47