Design and Evaluation of Shifted-Companion-Form Active Filters

Abstract

Two techniques for designing a class of low-sensitivity, follow-theleader, feedback-type active filters have been introduced by Hurtig and

Realization of BP active filters using UMLF structure with impedance-tapered biquads

“…The way of calculating the coefficients of the function F 1 (p) is rather simple, and identical to the way of the parameter calculation in [9]. For the new "predistorted" function F 1 (p) it is possible to calculate elements of the new LC filter, which has the same form as the filter in Fig.…”

“…It is known that the filter structures with multiple feedback loops can posses improved sensitivity properties, compared to the cascade structure of 2 nd -and 1 st -order filter blocks [1]- [9].…”

“…The realization of BP active-RC filters with transfer functions (TFs) of high order and low sensitivities to passive component variations has been a research interest for many authors in the field [1]- [9]. It is known that the filter structures with multiple feedback loops can posses improved sensitivity properties, compared to the cascade structure of 2 nd -and 1 st -order filter blocks [1]- [9].…”

Synthesis of MITE Log-Domain Filters with Unique Operating Points

“…The shifted-companion-form (SCF) [3] lends itself easily to synthesis by the proposed methodology. The MITE implementation of a SCF state-space system is particularly simple in the case where the transmission zeros are formed by summation of the state variables.…”

“…The MITE implementation of a SCF state-space system is particularly simple in the case where the transmission zeros are formed by summation of the state variables. The (A, B, C, D) matrices from (1) of this single-input single-output system are [3] …”