2010/1http://hdl.handle.net/11012/569492019-08-19T06:01:23Z2019-08-19T06:01:23ZSystematic Design of Fully Balanced Differential Current-Mode Multiple-Loop Feedback Filters Using CFBCCIIChunhua, W.Yang, L.Qiujing, Z.Yu, F.http://hdl.handle.net/11012/569822016-03-12T02:00:56Z2010-04-01T00:00:00ZSystematic Design of Fully Balanced Differential Current-Mode Multiple-Loop Feedback Filters Using CFBCCII
Chunhua, W.; Yang, L.; Qiujing, Z.; Yu, F.
In this paper, a systematic design method producing balanced current-mode filters is proposed, using current controlled fully balanced second-generation current conveyor circuit (CFBCCII). In this method, many kind of all-pole multiple loop feedback (MF) current mode balanced filters can be obtained, all the produced filters have fully balance structures. Moreover, the frequency of the filters can be electronically adjustable. The produced nth-order filters are constructed by n CFBCCIIs and 2n grounded capacitors, no resistors are needed. The sensitivities of the filters and influences of CFBCCII parasitic elements on filters are analyzed.
2010-04-01T00:00:00ZNew Grounded and Floating Simulated Inductance Circuits using Current Differencing Transconductance AmplifiersPrasad, D.Bhaskar, D. R.Singh, A. K.http://hdl.handle.net/11012/569832016-03-12T02:00:57Z2010-04-01T00:00:00ZNew Grounded and Floating Simulated Inductance Circuits using Current Differencing Transconductance Amplifiers
Prasad, D.; Bhaskar, D. R.; Singh, A. K.
Current differencing transconductance amplifier (CDTA) is receiving considerable attention as a building block for current-mode (CM) analog signal processing / signal generation. In this paper, new CDTA based lossless grounded and floating inductance simulation circuits have been proposed. The proposed grounded simulated inductance circuit employs two CDTAs and a single grounded capacitor whereas the floating simulated inductance circuit employs three CDTAs and a grounded capacitor. The circuit for grounded inductance does not require any realization conditions whereas in case of floating inductance only equality of two transconductances is needed (which can be easily maintained in practice by ensuring equal dc bias currents in the two transconductance amplifiers). Some sample results demonstrating the applications of the new simulated inductors using CMOS CDTAs have been given to confirm the workability of the new circuits.
2010-04-01T00:00:00ZGlobal Evolutionary Algorithms in the Design of Electromagnetic Band Gap Structures with Suppressed Surface Waves PropagationKovacs, P.Raida, Zbyněkhttp://hdl.handle.net/11012/569722017-03-16T08:05:32Z2010-04-01T00:00:00ZGlobal Evolutionary Algorithms in the Design of Electromagnetic Band Gap Structures with Suppressed Surface Waves Propagation
Kovacs, P.; Raida, Zbyněk
The paper is focused on the automated design and optimization of electromagnetic band gap structures suppressing the propagation of surface waves. For the optimization, we use different global evolutionary algorithms like the genetic algorithm with the single-point crossover (GAs) and the multi-point (GAm) one, the differential evolution (DE) and particle swarm optimization (PSO). The algorithms are mutually compared in terms of convergence velocity and accuracy. The developed technique is universal (applicable for any unit cell geometry). The method is based on the dispersion diagram calculation in CST Microwave Studio (CST MWS) and optimization in Matlab. A design example of a mushroom structure with simultaneous electromagnetic band gap properties (EBG) and the artificial magnetic conductor ones (AMC) in the required frequency band is presented.
2010-04-01T00:00:00ZA Terrestrial Multiple-Receiver Radio Link Experiment at 10.7 GHz - Comparisons of Results with Parabolic Equation CalculationsValtr, P.Pechač, PavelKvicera, V.Grabner, M.http://hdl.handle.net/11012/569712017-03-16T08:05:32Z2010-04-01T00:00:00ZA Terrestrial Multiple-Receiver Radio Link Experiment at 10.7 GHz - Comparisons of Results with Parabolic Equation Calculations
Valtr, P.; Pechač, Pavel; Kvicera, V.; Grabner, M.
This work presents the results of a terrestrial multiple-receiver radio link experiment at 10.7 GHz. Results are shown in the form of the power levels recorded at several antennas attached to a receiving mast. Comparisons of the measurement data with theoretical predictions using a parabolic equation technique show that, due to the complex propagation environment of the troposphere in terms of the refractive index of air, closer agreement between measurements and simulations can be achieved during periods of standard refractive conditions.
2010-04-01T00:00:00Z