Title :
Analysis of LO leakage in CMOS Gilbert mixer by cadence spectreRF for direct conversion application
Author :
Do, M.A. ; Liu, J.J. ; Yeo, Kiat Seng ; Ma, J.-G.
Author_Institution :
Centre for Integrated Circuits & Syst., Nanyang Technol. Univ.
Abstract :
The LO-RF leakage and feedthrough in double-balanced CMOS Gilbert mixers are analyzed from three aspects in this paper. They are an ideal mixer, a nonideal mixer with parasitic effects and an ideal mixer with LO mismatch. It is found that the LO phase mismatch and LO amplitude mismatch are both exponentially proportional to the LO feedthrough. If both of them occur at the same time, the amplitude square of LO leakage is equal to the sum of the amplitude square of each contribution
Keywords :
CMOS integrated circuits; mixers (circuits); oscillators; LO amplitude mismatch; LO feedthrough; LO leakage analysis; LO phase mismatch; LO-RF feedthrough; LO-RF leakage; cadence spectreRF; direct conversion; double-balanced CMOS Gilbert mixers; ideal mixer; nonideal mixer; parasitic effects; Application specific integrated circuits; CMOS integrated circuits; CMOS process; CMOS technology; DC generators; Digital signal processing; Integrated circuit technology; Mixers; RF signals; Radio frequency;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Conference_Location :
Tainan
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1412756
