Noise Cancellation and DC Offset Voltage Reduction using three Stage Cascaded Instrumentation Amplifier

In the field of the medical instrument and industrial electronics there is a requirement to measure and process near to the ground level signal and then provide amplification. The problem arises while measuring very low-level signals that it gets affected by noise present in the circuitry or in the wires. An operational amplifier is capable of measuring the difference between two signals effectively. A three op-amp topology of the instrumentation amplifier is used here to build three-stage cascaded instrumentation amplifier that can be effectively processed and amplify near to ground level signal and also reduce the offset voltage effect on the output as it was the main limitation of the cascaded structure of Instrumentation amplifier.