A 380 MHz Direct Digital Synthesizer

The paper describes the implementation of a 380 MHz, 13 bit, direct digital synthesizer/mixer IC in 0.25mum CMOS technology. The circuit employs an innovative architecture which divides the pi/4 rotation operation required in the quadrature synthesizer/mixers, in three rotations. The first two rotat...

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Bibliographic Details
Published in:	IEEE Journal of solid state circuits 42, 1 (2007).
Main Author:	De Caro, D.
Format:	Article
Language:	English
Subjects:	0.25 micron. 13 bit. 152 mW. 2.5 V. 380 MHz. CMOS integrated circuits. CORDIC datapath. Angle rotator. Carry-save arithmetic. Digital downconverter. Digital tuner. Digital upconverter. Direct digital frequency synthesizer. Direct digital mixer. Hybrid CORDIC architecture. Lookup table. Overflow prevention. Quadrature mixers. Quadrature modulator. Quadrature synthesizer. Rounding scheme. Sign-extension prevention.