Modeling of striplines between a power and a ground plane

Agarwal

Instrumentation Science & Technology

2012

& Diagnostic instruments need very high signal accuracy for interpretation of diseases. In the design of a high-speed multilayer printed circuit board (PCB) for medical instruments, partitioning of power=ground planes breaks the return path of the signal current, either through power=ground plane. It causes undesirable side effects on the PCB due to radiation effect, reflection of signal or crosstalk. Routing on the biomedical system with a smaller number of routing layers reduces performance of the PCB while high frequency signals cross the split plane. In this article, the impedance control method is proposed for minimizing the slot plane effect when high frequency signals crossing the slot gaps. It is a geometry-based method to understand the physical degradations in the PCB.

Section: Theoretical Aspectsmentioning

confidence: 99%

Using Impedance Control Method to Achieve Signal Integrity in Biomedical Equipment

Agarwal

Instrumentation Science & Technology

2012

“…For striplines, a modal decomposition approach has been proposed [45], [46]. Using this approach, the orthogonal parallel-plane and stripline modes are modelled independently, and then the modal behaviors are combined at the ends of the striplines.…”

Section: Traces Components and Slotsmentioning

confidence: 99%

Mitigation of Noise Coupling in Multilayer High-Speed PCB: State of the Art Modeling Methodology and EBG Technology

Fan

Paulis

et al. 2010

IEICE Trans. Commun.

SUMMARYNoise coupling on the power distribution networks (PDN) or between PDN and signal traces is becoming one of the main challenges in designing above GHz high-speed digital circuits. Developing an efficient and accurate modeling method is essential to understand the noise coupling mechanism and then solve the problem afterwards. In addition, development of new noise mitigation technology is also important for future high-speed circuit systems. In this invited paper, a novel modeling methodology that is based on the physics-based equivalent circuit model will be introduced, and an example of multiple layer PCB circuits will be modeled and validated with good accuracy. Based on the periodic structure concept, several new electromagnetic bandgap structures (EBG), such as coplanar EBG, photonic crystal power layer (PCPL), and ground surface perturbation lattice (GSPL), will be introduced for the mitigation of power/ground noise. The trade/offs of all these structures will be discussed.

“…The other technique, the use of a split ring resonator, is rarely used because of the difficulty of implementation in real designs. [6] Here a technique is described that addresses these problems. In the decoupling capacitor technique, various discrete decoupling capacitors are mounted on the board.…”

Section: Introductionmentioning

confidence: 99%

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

Instrumentation Science & Technology

Agarwal

Singh³

2015

& 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.