Analysis of high frequency behaviors of the self-biased TIA stage and implementation of an up-conversion mixer in millimeter-wave/terahertz band

Abstract

TIA (Trans-Impedance Amplifier) is usually selected as the input stage of the up-conversion mixers or the output buffer of the downconversion mixers. In this paper, we analysis the frequency limitations of the traditional self-biased TIA and propose an applicable model in millimeter-wave band. Then a high and wide IF millimeter-wave/terahertz band up-conversion mixer based on a 55-nm CMOS process is designed. The measured IF 3-dB bandwidth is 10.7 GHz, from 23.8 GHz to 34.5 GHz, and the RF frequency is from 121.5 GHz to 132.2 GHz. The DC consumption is only 8 mW under 1.2-V supply.