Mohanasankar Sivaprakasam

Learn More
Inductive coupling is commonly used for wireless power and data transfer in biomedical telemetry systems. The increasing demand on the performance of medical devices requires high data rate and high power efficiency at the same time. If only one radio frequency carrier is used, it is difficult to achieve both high data rate and high power efficiency due to(More)
Electrical stimulation of the retinal layer inside the eye has been identified as a form of visual prosthesis to restore lost vision in blind patients affected by retinitis pigmentosa and age-related macular degeneration, through several studies and experiments. While initial clinical experiments using retinal prosthesis have resulted in visual perception(More)
Inductive coupling is a common way to wirelessly transmit data to medical implants. In such applications, the carrier frequency is often limited to tens of MHz which is able to well penetrate the skin. To achieve high data rate, the number of carrier cycles used to modulate each bit should be as small as possible. This usually requires lowering the quality(More)
Cardiovascular diseases are the leading cause of death around the world. Non-invasive estimation of arterial parameters is significant in the early detection of cardiovascular diseases. In this work, we present an arterial compliance probe for calibration-free evaluation of carotid pulse pressure. This novel cuffless measurement technique uses dual magnetic(More)
A neural recording system for monitoring the behavior of sharks is presented. The system consists of an II.ARCHITECTURE WITHOFF-CHIPADC electrode array made of silicon neuroprobes that interface with Figure 1 shows the multiplexed system architecture with a flexible parylene cable that connects the electrode array to off-chip ADC. The goal is to demonstrate(More)
Advanced (proliferative) stage of diabetic retinopathy (DR) is indicated by the growth of thin, fragile and highly unregulated vessels, neovascularization (NV). In order to identify proliferative diabetic retinopathy (PDR), our approach models the micro-pattern of local variations using texture based analysis and quantifies the structural changes in vessel(More)