Title :
A 330-MHz 15-b quadrature digital synthesizer/mixer in 0.25-/spl mu/m CMOS
Author :
Song, Yongchul ; Kim, Beomsup
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Kore Adv. Inst. of Sci. & Technol., Daejon, South Korea
Abstract :
A quadrature digital mixer combined with a quadrature direct digital frequency synthesizer generates 15-b outputs from both 14-b inputs and internally synthesized carrier with a spectral purity greater than 100-dB. In this work, large-size tables for evaluating sine and cosine functions can be avoided by employing an interpolation-based fine/coarse vector rotation technique. The prototype IC fabricated in 0.25-/spl mu/m CMOS occupies 0.51mm/sup 2/ die area. it functions correctly up to 330-MHz, consuming 460-mW with a 2.5-V supply.
Keywords :
CMOS digital integrated circuits; direct digital synthesis; integrated circuit design; mixers (circuits); 0.25 micron; 25 V; 330 MHz; 460 mW; CMOS; cosine function; quadrature digital mixer; quadrature digital synthesizer; quadrature direct digital frequency synthesizer; sine function; spectral purity; synthesized carrier; vector rotation; Baseband; CMOS integrated circuits; CMOS technology; Digital signal processing; Error correction; Frequency control; Frequency synthesizers; Interpolation; Prototypes; Table lookup;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257185
