Low-voltage amplifier with improved linearity using triode region MOSFET

This paper proposes a voltage amplifier based on MOS current follower. It has a simple structure and depends on device matching instead of specific non-linear characteristics of active devices, and has greatly improved performance in terms of linearity, voltage signal dynamic range, and minimum supply voltage. Simulation results show that HD₂ of 1 V_p-p output voltage is about -50 dB at 1.8 V supply voltage and 90 μA static current.