This paper proposes a design method of separable denominator 2-D variable digital filters with high frequency tuning accuracy. In the proposed method, a parallel allpass structure with complex coefficients is used as a prototype structure of the 2-D variable digital filters. The proposed 2-D variable digital filters are composed of first-order complex allpass sections. To improve the frequency ...

A planar band pass filter topology is built using broadside coupled structure. The design is aimed at achieving pass band that covers the frequency range from 3.1GHz to 10.6 GHz. as required by modern Ultra Wide Band (UWB) indoor and outdoor communication systems . Multiple unlicensed users could share spectrum previously allocated to the users, including licensed users, on a non-interference b...

This paper aims to reveal the relationship between the minimum L2-sensitivity of state-space digital filters and the Gramian-preserving frequency transformation. To this end, we first give a prototype low-pass state-space filter in such a manner that its structure becomes the minimum L2-sensitivity structure. Then we apply the Gramian-preserving (LP-LP) frequency transformation with a tunable p...

Two new current mode fully differential current conveyor (FDCCII) based multifunction filter configurations are proposed. The first proposed current mode universal filter with single input and two outputs, which can simultaneously realize current-mode low-pass (LP) and band-pass (BP), filter responses employing single FDCCII. The second proposed current mode universal filter with one input and ...

In this paper, an optimal design of linear phase digital high pass finite impulse response (FIR) filter using Particle Swarm Optimization with Constriction Factor and Inertia Weight Approach (PSO-CFIWA) has been presented. In the design process, the filter length, pass band and stop band frequencies, feasible pass band and stop band ripple sizes are specified. FIR filter design is a multi-modal...

A new biquadratic filter with three voltage-inputs and one voltageoutput and one current-output is presented. The filter employs two types of current conveyors, grounded resistors and grounded capacitors to realize the lowpass, highpass and bandpass responses by selecting different input signals. The proposed circuit has high input impedance, independent adjustments of angular frequency 0 and q...

This paper presents a group of evolutionary mechanisms for the design of analog circuits, embedded on a genetic algorithm that performs the synthesis of an analog filter. The algorithm interacts with SPICE, to evaluate the fitness of evolved circuits. In order to model an analog circuit, a linear representation is introduced and its corresponding reproduction operators that preserve the valid t...

In this article we introduce a new method to construct finite orthogonal quadrature filters using convolution kernels. We show that every filter with value 1 at the origin can be obtained using an even nonnegative kernel. We apply the method to estimate the optimal frequency localization of finite filters. The frequency localization γp of a finite filter m0 is given by the distance in L p-norm ...

One compact microstrip low-pass filter using conventional elliptical headed dumbbell shaped

The human auditory system is insensitive to phase information of the speech signal. By taking advantage of this fact data such as the transcript, some keywords, and copyright information can be embedded into the speech signal by altering the phase in a prede ned manner. In this paper, an all-pass ltering based data embedding scheme is developed for speech signals. Since all-pass lters modify on...