Title :
A high performance band-pass DAC architecture and design targeting a low voltage silicon process
Author :
Mullane, Brendan ; O´Brien, Vincent
Author_Institution :
Dept. of Electron. & Comput. Eng., Univ. of Limerick, Limerick, Ireland
Abstract :
Direct Digital Synthesis (DDS) systems generate adjustable high resolution phase and frequency signals that are used in a wide variety of applications such as multi-mode RF, communications, measurements and test. A high performance band-pass DAC architecture and implementation is presented that delivers high spectral purity over a narrow-band response. The low power DAC is portable to standard CMOS processes and achieves 110dB narrowband SFDR performance using sigma-delta (μΔ) modulation and multi-bit current steering techniques. A 3rd order digital μΔ 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.
Keywords :
CMOS digital integrated circuits; digital-analogue conversion; direct digital synthesis; modulators; sigma-delta modulation; spectral analysis; 3rd order digital modulator; CMOS process; DEM block; digital dynamic element matching block; direct digital synthesis system; frequency signal; high performance band-pass DAC architecture; high resolution phase; high spectral purity; low power DAC; low voltage silicon process; mismatch variation process; multibit current steering technique; narrow-band response; narrowband SFDR performance; sigma-delta modulation; Band pass filters; Computer architecture; Frequency modulation; Layout; Switches; Switching circuits; Band-Pass DAC; DDS; Digital to Analog Converter; Noise-shaping DEM; Static Mismatch;
Conference_Titel :
VLSI and System-on-Chip (VLSI-SoC), 2011 IEEE/IFIP 19th International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4577-0171-9
Electronic_ISBN :
978-1-4577-0169-6
DOI :
10.1109/VLSISoC.2011.6081601
