Symbolic framework for linear active circuits based on port equivalence using limit variables

Published versio

On the Systematic Synthesis of OTA-Based KHN Filters

According to the nullor-mirror descriptions of OTA, the NAM expansion method for three different types of KHN filters employing OTAs is considered. The type-A filters employing five OTAs have 32 different forms, the type-B filters employing four OTAs have 32 different forms, and the type-C filters employing three OTAs have eight different forms. At last a total of 72 circuits are received. Having used canonic number of components, the circuits are easy to be integrated and both pole frequency and Q-factor can be tuned electronically through tuning bias currents of the OTAs. The MULTISIM simulation results have been included to verify the workability of the derived circuit

A mathematical framework for active circuits based on port equivalence using limit variables

Published versio

RC-gyrator ladder and RLC symmetrical lattice network synthesis - A state-space approach

This dissertation presents two network realization procedures using the state-space approach. The first procedure is the realization of a transfer function. A state model (A,B,C,D) is obtained from the given transfer function by inspection, where A is a companion matrix. Through a similarity transformation T, another state model (F,G,H,J) is obtained, where F is a tridiagonal matrix and can be realized by a RC-gyrator ladder network. The input source is inserted in the proper position of the ladder network, and the output is obtained through a summing circuit. It is a unified procedure and uses simple algebraic computation. A general expression of the similarity transformation T is derived for any order. It is a minimal realization. The second procedure is the realization of an A matrix with a symmetrical lattice network. It is shown that the network functions of a symmetrical lattice network have a common factor in their numerators and denominators. Also, the eigenvalues of the A matrix are the poles and zeros of the driving-point functions. The A-matrix realization procedure is based on these properties. The synthesized network that consists of RC, RL , LC, or RLC elements depends on the locations of the eigenvalues of A. It is not a minimal realization --Abstract, page ii

Symbolic Active Rc Circuit Synthesis Using Matlab

Implementation of the procedure for synthesis of the active RC circuit from prescribed transfer function using MATLAB (R) , without prior knowledge of topology or circuit architecture is presented. Method is based on the reverse process of a Gaussian pivotal elimination applied to nodal admittance matrix as proposed in [6]. This method is very useful for searching alternative circuits realizations of the same transfer function, or with modifications to find several even all realizations in some level. Given implementation has several limitations like specific input transfer function format and interaction with human for further decisions in the synthesis process

Analogue filter networks: developments in theory, design and analyses

Not availabl

Computer-aided circuit design during the initial stages

Imperial Users onl

Improved Rational Two-Port Model of Uniform R-C-NR Structure

The indefinite admittance matrix of the uniform R-C-NR structure (1) is written in a modified manner. The new expressions for the admittance parameters are expanded utilizing the technique postulated earlier by Dutta Roy and Kumar (2). A rational two-port lattice equivalent of the uniform R-C-NR structure is constructed. This proposed model is much more accurate over a much wider frequency range and is very much improved because it stimulates the characteristics more precisely and extensively

Computer-aided circuit analysis Annual report, May 15, 1965 - May 14, 1966

Research on digital computer aided analysis of electric circuit