| OCR Text |
Show 5 loaded during an initialization phase or computed once, but it can not generate a mesh or finite element array and solve it. The third way for the count of nodes to be increased is to divide a path whenever it crosses another geometry, but this has such an extreme effect on the count of nodes that it might be phrased 'shattering a node'. The table of node-to-node capacitance values is similarly affected by the alternate ways of figuring nodes. Where two 8 bit busses cross, there are obviously 64 interactions, and a node-to-node table using area nodes has 64 entries. When nodes are points at the ends of the bus lines, then each line has two nodes, and the table has 256 entries. When paths have been divided into smaller pieces, then the number of entries in the table is larger still. The potential data explosion follows from the ways of dividing paths into many nodes and the impact of this on the node-to-node table. The emphasis of a project to determine accurately internodal capacitance is to divide nodes intelligently into the least number of derived nodes, and then simplify the nodeto- node table given relevant nodes and threshold values. The Complexity of Capacitance The classical model of capacitance has two electrical plates separated by a dielectric, and the charge on the plates is proportional to the voltage, the area, and the thickness of the dielectric material. s Geometries built on silicon have the two problems of capacitance to substrate and capacitance to neighboring geometries. Gallium arsenide and silicon on sapphire technology |
