An Ultra Low-Power Fully Differential Operational Transconductance Amplifier (FD-OTA) Operating in Weak-inversion Region and Its Applications

† Abstract- A low-power, low-voltage CMOS fully differential operational transconductance amplifier (OTA) operating in weak inversion region is presented in this paper. The proposed element allows the use of very small current for low-power and low- voltage features. The performances are examined through PSPICE simulations, displaying usabilities of the new active element. The power consumption is about 35.5pW at ±0.75V. The description includes examples as a current-mode full-wave rectifier and current splitter.