J. J. Liu Manh Anh Do X. P. Yu Kiat Seng Yeo Shan Jiang Jianguo Ma Cmos Even Harmonic Switching mixer for Direct Conversion Receivers. 183-196 2006 15 Journal of Circuits, Systems, and Computers 2 http://dx.doi.org/10.1142/S0218126606003131 db/journals/jcsc/jcsc15.html#LiuDYYJM06