Summary

SCNAP4 is high performance software for the analysis of general linear networks, especially ideal and non-ideal switched capacitor and switched-current circuits in both time and frequency domain. It also provides full non-ideal sensitivity analysis and noise analysis with a unified data structure and modularised program structure.

The pre-processing of large amounts of frequency-independent material reduces computation costs while interpretable code generation, polynomial approximation of excitation, descretization of the whole system and Hessenburg techniques are fully exploited.

SCNAP4 currently features:

Efficient analysis of very large periodically switched networks (SC, SI and CT) - including +/-R, +/-L, +/-C.

• Time domain
• Frequency domain
• All linear non-idealities ( Rsw, GB, Rin, Rout )
• Continuous and S/H signals
• Multi-rate clocks and many nodes

Sensitivity analysis

• w.r.t. all components ( R,C, Rsw, GB, Rin, Rout, Gm,... )
• individual and global sensitivities

Noise analysis

• SC and SI circuits - baseband and full ailaising
• CT full frequency range

Accuracy and efficiency

• Pre-processing of frequency independent sections
• Interpretable code generation
• Hessenburg techniques
• Sparse matrix techniques
• Semi-symbolic version available

Applications

• True mixed mode analysis
• Circuit optimisation

Availability

We can supply versions of SCNAP4 for the following:

SCNAP4 can be supplied on CD or floppy disk and comes complete with a suite of examples and a User Guide. Contact sewell@elec.gla.ac.uk for further information. Interested users from the USA and Canada can access a display site at the University of Toronto - contact Professor Ken Martin.

The software is available under licence from the University - contact James Paris
at jparis@mis.gla.ac.uk for licensing details.