Active-RC All-pass Filter

Abstract

The Teramoto method of realizing an RC all-pass is modified to obtain a grounded output with convenient impedance level. Additionally, it is shown that the circuit with a unity-gain amplifier and a little increased complexity of the passive parts, provides the same facilities. An n-th order all-pass with arbitrary complex poles can also be realized in this scheme for symmetric orientation of the branch admittances of the bridge. A second-order Padé delay network is presented by way of example of the generalized realization method.

Indexing Terms:

• Active-RC Filters
• All-pass Filters