Now showing items 1-19 of 19

  • Adjoint Networks with Inverting and Noninverting Current Conveyors 

    Vrba, K.; Dostal, T.; Cajka, J. (Společnost pro radioelektronické inženýrství, 2000-04)
    Four types of second-generation current conveyors are shown. The realisation of the above conveyors using differential voltage current conveyors (VDCC) is presented. Two examples illustrate the building of adjoint networks ...
  • All-Pass Filters in Current Mode 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 2005-09)
    Analogue first, second and high-order all-pass active filters in the current mode, with constant group delay and magnitude responses, are presented in this paper. These filters are based on a modification of the multi-loop ...
  • ARC Filters Using Only Followers 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 1999-04)
    Several structures of the active RC filters using non-inverting voltage unity-gain followers and dual current positive followers are given in this paper. These structures can be suitable implemented by the positive second ...
  • ARC Filters with Diamond Transistors and Buffers 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 1998-12)
    Active RC first and second order filters using diamond transistors (voltage controlled current sources) and voltage diamond buffers (voltage controlled voltage sources) are given in this paper. Circuits are simulated and ...
  • Biquads Based on Single Negative Impedance Converter Implemented by Classical Current Conveyor 

    Dostal, T.; Axman, V. (Společnost pro radioelektronické inženýrství, 2007-09)
    The paper deals with continuous-time ARC biquadratic (second-order) filters based on the single classical three-port current conveyors, so called second generation CC II. A unique application of the CC II is discussed, ...
  • Comparison of Several Modes in Simple ARC Second-Order Filter 

    Dostal, T.; Rybin, A. I. (Společnost pro radioelektronické inženýrství, 1994-07)
    In this paper the popular, multiple-feedback, ARC single opamp, highpass second-order filter is proposed in several types of modes, namely voltage, current and hybrid ones. These modes are studied and compared in detail. ...
  • Filters with Multi-Loop Feedback Structure in Current Mode 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 2003-09)
    Universal multifunctional (low-pass, high-pass, band-pass, band-reject and all-pass) nth-order active RC filters in current mode are presented in this paper. The filters are based on several multi-loop feedback and ...
  • Functional Blocks and Biquadratic ARC Filters using Transimpedance Amplifiers 

    Dostal, T.; Prokop, R.; Sarman, R. (Společnost pro radioelektronické inženýrství, 1997-04)
    The aims of the article are design and analysis of modern circuits including high performance functional blocks and biquadratic filters using transimpedance amplifiers. Here are given various types of these circuits, that ...
  • High Frequency State-Variable Biquadratic Active Filters 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 1998-04)
    The state-variable (KHN) active RC biquadratic filters with good performance in high frequency range , flexibility of outputs (LP, HP, BP), low sensitivities in novel current and hybrid modes, using current conveyors, ...
  • High-Order Lowpass Filters Using DVCC Elements 

    Cajka, J.; Dostal, T.; Vrba, K. (Společnost pro radioelektronické inženýrství, 2002-06)
    Special cells using a differential voltage current conveyor are presented. The use of these cells for high-order lowpass filter design is described. The filters can be designed to operate in different modes.
  • Modeling of Modern Active Devices for Simulations of Analog Circuits in PSpice 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 2000-09)
    Suitable models of the modern active components and functional blocks, namely new types of current conveyors, operational and transimpedance amplifiers, in several appropriate levels, using analog behavioral modeling are ...
  • New Second-Order Optimized Filter Design 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Dostal, T.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2003-04)
    Starting from the piecewise-linear (PWL) autonomous dynamical system optimized from the eigenvalue sensitivities viewpoint the corresponding optimized non-autonomous linear (single-input single-output) system is derived. ...
  • Nodal Analysis of Circuits Containing Current Conveyors 

    Rybin, A. I.; Dostal, T. (Společnost pro radioelektronické inženýrství, 2001-09)
    A special method of the nodal analysis of the circuits containing several types of the multiport current conveyors is presented in this paper. The method is based on the given regular and homogeneous models of the irregular ...
  • On Canonical Structures of ARC Biquadratic Filters with Single Transconductor 

    Dostal, T. (Společnost pro radioelektronické inženýrství, 2006-06)
    The paper deals with simple canonical structures of the second order ARC filters employing only single transconductor (OTA) and passive components R and C. A systematic design procedure of this circuits based on the given ...
  • Realization of Nth-Order Voltage Transfer Function using Current Conveyors CCII 

    Cajka, J.; Dostal, T.; Vrba, K. (Společnost pro radioelektronické inženýrství, 1997-06)
    A universal method for the realization of arbitrary voltage transfer function in canonic form is presented. A voltage-controlled current-source using a plus-type second-generation current conveyor is here applied as the ...
  • Signal-Flow Graph Network Analysis 

    Dostal, T.; Mikula, J. (Společnost pro radioelektronické inženýrství, 1992-10)
    A novel type of signal-flow graph is presented creating minimum number of nodes for independent voltages only. The graph will be derived by inspection of the network using special transforming T-graphs. The method is useful ...
  • Simply Adjustable Sinusoidal Oscillator Based on Negative Three-Port Current Conveyors 

    Sotner, R.; Hrubos, Z.; Slezak, J.; Dostal, T. (Společnost pro radioelektronické inženýrství, 2010-09)
    The paper deals with sinusoidal oscillator employing two controlled second-generation negative-current conveyors and two capacitors. The proposed oscillator has a simple circuit configuration. Electronic (voltage) adjusting ...
  • Study of Adjustable Gains for Control of Oscillation Frequency and Oscillation Condition in 3R-2C Oscillator 

    Sotner, R.; Jerabek, J.; Herencsar, N.; Hrubos, Z.; Dostal, T.; Vrba, K. (Společnost pro radioelektronické inženýrství, 2012-04)
    An idea of adjustable gain in order to obtain controllable features is very useful for design of tuneable oscillators. Several active elements with adjustable properties (current and voltage gain) are discussed in this ...
  • Switched Capacitor Equivalent of Frequency Dependent Negative Resistor 

    Mikula, J.; Dostal, T. (Společnost pro radioelektronické inženýrství, 1993-07)
    A new circuit of frequency dependent negative resistor (FDNR), derived using an almost linear s-z transformation in a four phase switched capacitor (SC) network is presented.