Design of high CMRR two stage gate driven OTA using 0.18 um CMOS Technology
Operational Transconductance Amplifier (OTA) is an amplifier which uses the differential input voltages and generates the output current. Therefore, it can be called as a voltage controlled current source. OTA is an important building block in designing of continuous time analog filters. Existing trend in continuous scaling down of the transistor size and reduction in power supply have added to the design challenges. Here we design a two stage gate driven OTA using TSMC 0.18 mm CMOS Technology. This OTA operates at a supply voltage of 2.5 V and provides a gain of 46.5 dB, unity gain bandwidth of 9.9 MHz, Common Mode Rejection Ratio (CMRR) of 96 dB, gain margin of 20 dB, phase margin of 75deg and consumes a power of 0.403 mW.
2016 International Conference on Computer Communication and Informatics (ICCCI)