A class of active-RC filters with predictive characteristics

A class of analog continuous-time filters is introduced, having predictive properties for specified narrow-band signal models, such as low-order polynomials or sinusoids. Such filters are designed by using model transfer functions designed in the discrete-time domain. 2- to s-domain mapping is done using the inverse bilinear transformation. Predictive analog filters are implemented using active-RC structures. Several examples of constructed and measured prototypes are given, using the state-variable structure for biquads, and a single-op-amp structure for real poles and zeros.