A low-voltage high-linearity ultra-wideband down-conversion mixer in 0.18-?m CMOS technology
This paper presents a wideband mixer chip covering the frequency range from 3.4 to 6.8GHz using TSMC 0.18?m CMOS technology. The linearity can be improved using multiple-gated-transistors (MGTR) topology. The measured 3-dB RF frequency bandwidth is from 3.1 to 6.8GHz with an IF of 10MHz. The measured results of the proposed mixer achieve 7.24.3dB power conversion gain and 23dBm input third-order intercept point (IIP3), and the total dc power consumption of this mixer including output buffers is 2.9mW from a 1V supply voltage. The current output buffer is about 2.17mW, and the excellent LORF isolation achieved up to 54dB at 5GHz. The paper presents a mixer topology that is very suitable for low-power in ultra-wideband system applications.
mgtr iip3 gilber-cell mixers uwb