PLL Based Synchronous Read-Out for Resonant Biosensors.

Resonant Biosensors are being preferred for biomedical measurement and diagnosis applications, thanks to advances in micro-electro-mechanical (MEMS) technologies. In this paper, Verilog implementation and simulation results of a PLL-Based synchronous read-out, designed to measure the frequency change that is detected by resonant biosensors, is presented. The digital design of the sensor read-out offers low complexity and adaptability to different technologies. The first-order PLL based design shows high accuracy in 398-402 MHz range according to simulations.