A Low Power Wide Linear Range OTA and Its Application in OTA-C Filter

A fully-differential symmetric CMOS operational transconductance amplifier (OTA) with negative current feedback is presented in this brief. The source degeneration topology in previous researches is modified to achieve higher linearity in the proposed circuit. Simulation results show that the IIP3 is 24.80dBm and the input voltage swing is up to 1 V. The power consumption of the proposed OTA is less than 14μw. A third order low-pass OTA-C filter implemented with the presented OTA is verified in the end.

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