Low-Power LNA in Analog Front End for Biomedical Applications

Biomedical devices have enormous possibilities in health applications. A low-noise amplifier (LNA) is a crucial circuit in neural recording, ECG, and EEG systems. The performance of LNAs has to vary with the characteristics of their different components. This contribution presents an empirical comparison between the latest state-of-the-art LNAs in health applications. Using the specter tool of MOS technology, LNAs have implemented at 180, 90, and 65 nm and simulated at a wide supply voltage (1–1.8 V) range. There are 99.9% power variation, 103.7% bandwidth range, 93.18% gain range, 91.17% noise figure vary, and IIP3 97.5% area variation for different LNA designs. Different LNAs have used in analog front end (AFE) design/circuits. A comparison of AFE designs has shown that there are 85.07% power saving, 79.78% maximal bandwidth, and 93.54% best performance.