Oscillation test structures of active RC filters

We have presented the oscillation-based test transformations of active RC filter configurations that can be used as a basis of a simple and effective go/no-go test. The advantage of the presented solutions is that they require only minor circuit modifications. The solutions where an additional switch is introduced offer the possibility of a built-in self-test implementation. On the other hand, the solutions that make use of an external feedback form the basis for the implementation of a simple automatic tester.