Title :
A 2 GHz CMOS even harmonic mixer for direct conversion receivers
Author :
Fang, Sher Jiun ; Lee, See Taur ; Allstot, David J. ; Bellaouar, Abdellatif
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
An even harmonic mixer implemented in a 0.25 μm standard digital CMOS process for applications in 2 GHz direct conversion receivers is described. The novel mixer circuit overcomes the classical DC offset problems that degrade the sensitivity performance of direct conversion receivers using conventional mixers. Simulated with a 1% gm mismatch, the new even harmonic mixer achieves excellent DC offset cancellation and IIP2 values of 87 dB and +40 dBm, respectively. The mixer draws 1.71 mA from a single 3 V power supply.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF mixers; radio receivers; 0.25 micron; 1.71 mA; 2 GHz; 3 V; CMOS process; DC offset cancellation; IIP2 values; direct conversion receivers; even harmonic mixer; sensitivity performance; CMOS process; CMOS technology; Ceramics; Circuit simulation; Degradation; Mixers; Power harmonic filters; Power supplies; RF signals; Radio frequency;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010580
