Abstract
A technique for designing square-root domain elliptic filters that simulate the operation of the corresponding LC ladder prototypes is introduced in this paper. This is achieved by manipulating the equations that describe the operation of differentiation in such a way that only lossless integrator and weighted summation blocks are needed. The derived signal flow graph (SFG) is transposed to the corresponding one in the square-root domain using an appropriate set of operators in order to preserve the linear operation of the whole filter. In order to demonstrate the validity of the proposed technique, a third-order elliptic lowpass filter was simulated and its behavior was evaluated using an HSPICE simulator.
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