Design of an Instrumentation Amplifier using Bulk-Driven Op-Amp

Instrumentation amplifier are the critical components used for monitoring body signals in bio-potential instruments like ECG, EMG, and EEG in order to diagnose patient issues. The most significant bio-potential amplifier is the instrumentation amplifier which is used to amplify tiny differential input signals. As a result, the instrumentation amplifier amplifies even the small body signals. Henceforth, the main objective of this study is to design an instrumentation amplifier with improved characteristics operating at 350mv low voltage and 1nA low current. Also, this paper designs the instrumentation amplifier by using folded cascode two stage op-amp for attaining a maximum gain.