Author/Authors :
Khosrojerdi، Iman نويسنده Department of Electrical Engineering, Imam Reza International University, Mashhad, Iran , , Rezvani، Amin نويسنده Department of Electrical Engineering, Imam Reza International University, Mashhad, Iran , , Pourandoost، Reza نويسنده Department of Electrical Engineering, Sadjad Institute of higher Education, Mashhad ,
Abstract :
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 0.18 µm CMOS technology. The performed simulation results show an input-referred noise of 520.2 nV/?Hz at 1 mHz, so reduces it to 115.8 pV/?Hz at 1 Hz, and a power consumption of 191.9 nW under 5 pF loads. The dc open loop gain is 53.13 dB, a phase margin of 50o and a unity gain-bandwidth (UGB) of 572.9 kHz while operating at 0.8 V supply voltage. The proposed OTA is suitable for the low noise and low-power applications such as medical applications.
