Ultra low power LNA design for biomedical implants

In this paper some traditional techniques for designing LNAs are investigated and compared in terms of suitability for biomedical implants. This includes comparing the LNAs based on two conventional figures of merit (FOM) and a new modified FOM more suitable for neural prostheses and biomedical implants considering the emphasis for low power and small size requirements of such devices. Based on the post layout simulation results, the widely used inductor loaded LNA topology has resulted in less favorable results than the inductorless counterparts, recommending the possibility of using such designs for biomedical implants. The paper also suggests a new hybrid LNA design based on gm-boost technique to provide the evidence of better performance. Also the detailed performances outlined in this paper, guide a designer to make better choices when designing LNA in biomedical implants and embedded systems.