Iman Khosrojerdi - Imam Reza International University
Amin Rezvani - Imam Reza International University
Reza Pourandoost - sadjad institute of higher education

In this paper a low-noise low-power CMOS operational transconductance amplifier (OTA) using dynamic threshold voltage MOSFET (DTMOS) technique is presented. The OTA is designed and simulated using ۰.۱۸ µm CMOS technology. The performed simulation results show an input-referred noise of ۵۲۰.۲ nV/√Hz at ۱ mHz so reduces to ۱۱۵.۸ pV/√Hz at ۱ Hz, and a power consumption of ۱۹۱.۹ nW under ۵ pF loads. The dc open loop gain is ۵۳.۱۳ dB, a phase margin of ۵۰o and a unity gain-bandwidth (UGB) of ۵۷۲.۹ kHz while operating at ۰.۸ V supply voltage. The proposed OTA is suitable for low noise and low-power application such as medical application

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