Design and Analysis of CMOS Low Power OTA for Biomedical Applications

This proposed work contributes to the design of Operational Transconductance Amplifier (OTA) which is used in Cardiac Implantable Medical Devices (IMD) for monitoring heart activities. Nowadays there is a big need in designing a low power and low noise OTA to extend the life time of primary battery. This work proposes the design of amplifier for cardiac Implantable Device, which is used for monitoring the heart pulses with high gain, low noise and low power consumption the designing of low power OTA benefits from voltage to current conversion to achieve a very low power, low noise and high gain for IMD. The proposed OTA is designed in a 45nm CMOS process, the simulation shows that the frequency of the OTA is adjustable in the range of 20KHz and it has the capability of measuring the gain in 51dB, while consuming only 11.9μW power from 1-V single power supply and an input referred noise of 1.22μVrms, The proposed OTA's performance has satisfied the required parameters and layout has been designed which is highly suitable for Cardiac IMD.