Simulating Open Circuits

IC-CAP uses the OPEN_RES variable to handle any floating nodes. This variable allows an open circuit to be simulated as a large resistance. The value of the resistance is equal to the value of the OPEN_RES variable. A resistor of this magnitude is automatically connected to all external circuit nodes not connected to a specified source. When the OPEN_RES variable is not specified, a current source set to zero (0) amps is used instead. However, using the current source may cause simulation convergence problems.