Search

Design and implementation of Automatic Schematics Verification Platform based on open EDA (Electronic Design Automation) tools has been discussed. This platform adopts client/server pattern and provides an environment of design Verification and sharing data for designers separately, and at the same time, this platform has strong transplantable ability because of it’s strong cohesion and weak coupling with the open EDA tool, therefore we can transplant this platform to other open EDA tools expediently.

To analyze the inhibition to SSN, we use the design and emulation tools from Ansoft Co., which are used in the optimization design on PDS, integrated with particular circuit designs. Firstly, the traditional means of adding Decoupling Capacitor is adopted to inspect and verify that increased decoupling capacitors will help to increase high frequency response. Secondly, we introduce a high impedance electromagnetic surface texture, which can be applied to decrease SSN. Lastly, we support that EBG is better than traditional adding decoupling capacitor.

As the optimum of extremum value control system drifts faster it may make bigger error for pre-estimating statically the optimum, it is particularly remarkable if the transfer function of the linear part is with a high order dynamic element. In this paper, a method based on LS(least squares) is presented to pre-estimate dynamically the optimum of extremum value control system. The linear part of controlled plant could be approximated by a cascade of 1st order dynamic element and a pure time delay element as the controlled model is simplified it is successfully resolved for pre-estimating dynamically the optimum of extremum value control system with a high order element by LS.

The power/ground plane Segmentation suppress the simultaneous switching noise by cutting off the path of SSN. A power/ground Segmentation plane model is established and simulated by software HFSS10.0 to analyze the power/ground plane segmentation current return paths. The simulation results that the slotted plane forced return current to flow back from a distance, and circuit size increases, leading to a potential threat of electromagnetic interference.