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A 2 GHz CMOS even harmonic mixer for direct conversion receivers

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4 Author(s)
Sher Jiun Fang ; Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA ; See Taur Lee ; Allstot, D.J. ; Bellaouar, A.

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.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:4 )

Date of Conference:

2002