A 60 dB Bulk-Driven Rail-to-Rail Input/Output OTA

In this paper, an ultra low voltage ultra low powerbulk-driven operational-transconductance-amplifier (OTA) isproposed. The proposed OTA operates at power supply of 0.35 Vwith bias current of 25nA and power dissipation in the circuit isbelow 40nW. Simulation results for the OTA shows that circuitachieves gain of 60 dB and 83.2° phase margin (PM) with unitygain bandwidth (UGB) of 31.6 KHz. Proposed OTA is capable ofdriving loads up to 22 pF and has rail-to-rail output swing andICMR. The proposed circuit is also tested for voltage followerand integrator application.

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