In this paper we present a novel technique for OTA-C filter realizations with finite zeros based on doubly loaded passive ladder networks. Only grounded capacitors are needed; all floating capacitors are replaced with active simulations eliminating bottom-plate parasitic capacitors and non-observable poles. Bandpass, highpass and bandstop filters are easily obtained from a lowpass OTA-C prototy...

This paper addresses a new approach for the design of multiband filters with step like magnitude responses and extremely flat, weighted passbands down to μdBs. Our new technique can also be used for the multiband step-wise approximation of arbitrary filter magnitude responses with precise transition band control. One marked advantage of the technique is that our basic building blocks are the mo...

A voltage-mode high input impedance first-order allpass, highpass and lowpass filters using two differential voltage current conveyors (DVCCs), one grounded capacitor and one grounded resistor is presented. The allpass, highpass and lowpass allpass signals can be obtained simultaneously from the circuit configuration. The suggested filter uses a canonical number of passive components without re...

In a real situation, digital filters are usually implemented via the two’s complement arithmetic because subtraction can be implemented easily via addition. However, the two’s complement arithmetic involves a periodic discontinuous nonlinear function, and the dynamics of digital filters could be very complicated even when no input signal is applied. Limit cycle and chaotic behaviors could occur...

One configuration for realizing voltage-mode multifunction filters and another configuration for realizing current-mode multifunction filters using current feedback amplifiers (CFAs) are presented. The proposed voltage-mode circuit exhibit simultaneously lowpass and bandpass filters. The proposed current-mode circuit exhibit simultaneously lowpass, bandpass and highpass filters. The proposed ci...

In this work, copper selenide thin films coated onto glass and transparent lanthanum substrates are studied. The (glass, La)/CuSe which prepared by the thermal evaporation technique under a vacuum pressure of 10−5 mbar structurally, morphologically, optically, dielectrically electrically characterized. Lanthanum improved crystallinity increasing crystallite size decreasing both microstrains def...