A Current-mode ACG base on Sub-threshold MOS Translinear Principle

This paper presents a current mode of automatic gain control (AGC). The proposed AGC is designed based on the principle of sub-threshold MOS translinear. It consists of a current-mode exponential amplifier, a precision rectifier, a low pass filter, and an integrator. The AGC's performance is demonstrated by PSPICE simulations in 0.18 $\mu m$ TSMC CMOS technology. The simulation results of the proposed circuit at the supply voltage of ± 1.2V show that the settling time is 4ms and the maximum power consumption is 1.27mW.