SCN Z-domain equivalent circuit fault diagnosis

The authors have devised a new fault diagnosis method for SCNs (switched-capacitor networks)-Z-domain equivalent circuit fault diagnosis, and presents its principle, mathematical background and algorithm realization. Then the diagnosability of SCNs by the new method is discussed, and the topological testability theory of the analog circuit fault diagnosis problem is extended to the SCN. The necessary condition of the k-node fault testability for SCN is given. This is extremely powerful because the result depends only on the topology of the Z-domain equivalent network and the condition can be checked by inspection. Finally, an applied example is given to illustrate the technique