Mixed mode circuit simulator SPLIT2.1 using dynamic network separation and selective trace

This paper proposes a mixed mode simulation using dynamic network separation and selective trace. Since the separation technique enables the analysis of each subcircuit independently, it is possible to skip solving the latent subcircuits according to selective trace, though it is based on the direct method. Selecting the time points in accordance with activity of each subcircuit is analogous to multirate numerical integration technique used in the waveform relaxation algorithm. As a result, the matured direct/relaxation-based mixed mode simulator, including a variety of skilful techniques, is realized