Simultaneous Switching Noise Enabler in High-Speed Biomedical Systems by Integrated Plane Coupling

Abstract

& The performance of high-speed biomedical systems is adversely affected by switching noise caused by inductance in the power supply distribution network. In a high-speed medical system, signals are switched at rates up to 5 Gbps and discrete capacitors are ineffective in reducing the noise at this rate. The noise may affect patient care. Integrated plane coupling effectively minimized simultaneous switching noise by creating high capacitance between the planes. Although the suppression of electromagnetic interference due to switching noise on the component and printed circuit board is difficult, the integrated plane coupling at the front-end of the design cycle was shown to eliminate noise. The effect of switching noise coupling was investigated and a solution is reported. A test board was analyzed and the results were compared with simulations. This approach was shown to be effective in minimizing switching noise in high-speed biomedical systems.

Suppression of Simultaneous Switching Noise Using Embedded Capacitor Method in High-Speed Systems

“…SSN occurs at both the chip level and the board level. At the chip level, the power supply is not perfect [5]. The board-level power must supply any sudden demand for current through the inductive chip package and lead frame.…”

Package Board Co-Simulation Using Equivalent Circuit Modeling Method for High-Speed System

“…Figuer:1 Lead Frame wire-bond package cross-section When designing transmission lines, there are two types: microstrip and stripline, depending on the routing layer. Power and ground planes must meet power integrity requirements, including low loop inductance [5]. In multilayer BGA packages, vias and BGA ball pads have strong capacitive coupling with the ground planes of the entire package, especially at high frequencies [6].…”