Low power design of bulk driven operational transconductance amplifier

An operational transconductance-amplifier (OTA) is basically designed for low voltage and low power applications. Bulk driven technique is applied at the input of the proposed OTA that allows the OTA to operate at the minimum supply voltage. Bulk driven transistor removes the threshold voltage limit of the transistor. The proposed technique provides OTA with the rail-to-rail input range with minimum supply voltage. In this paper, the bulk driven technique is used to provide low power consumption in the operational transconductance amplifier with improvement in the transconductance of the amplifier. The CMOS technology 45nm is used for the designing of the proposed OTA circuit. Measurement results indicate that the proposed OTA circuit operated with 0.7 V supply voltage requires the 60.15% of lower power consumption compared to the basic OTA circuit with slightly affecting the other parameters such as transconductance, leakage current, noise and leakage power.