Yazar "Un, Mahmut" seçeneğine göre listele

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    Cascadable Current Mode Multifunction Biquadratic Filter
    (Beykent Üniversitesi, 2011) Un, Mahmut; Kacar, Firat
    A novel three inputs and single output current-mode universal biquadratic filter with high input and high-output impedance using three plus-type differential difference current conveyors, grounded capacitors and resistors is presented. The proposed circuit offers the following features: realization of all the standard filter functions that is high pass, bandpass, lowpass, notch and all pass filters, no requirements for component matching conditions, the use of only grounded capacitors and resistors, high input and high output impedance and low active and passive sensitivities.
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    Current Mode All-Pass Filter Using a Single CDBA and Its Application
    (Beykent Üniversitesi, 2009) Un, Mahmut; Kacar, Firat
    A current-mode all-pass filter configuration is proposed in this paper. The proposed circuit consists of a current differencing buffered amplifier (CDBA), one resistor and capacitor. Since the output of the filter exhibits low output impedance, the synthesized filter can be cascaded without additional buffers. Moreover, the proposed circuit is insensitive to parasitic input capacitances and resistances due to internally grounded input terminals of CDBA. Furthermore, it does not impose any component matching constraint in analog signal processing circuits. To explore the performance of the proposed filter structure, a new current-mode quadrature oscillator which has minimum number of passive components is implemented. The performances of the proposed all pass filter as well as the quadrature oscillator are also investigated by applying sensitivity analysis to the both proposed circuits. Finally the theoretical results are verified with PSPICE simulations using a CMOS realization of CDBA.
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    Current Mode Multifunction Biquad Filter Using Two Iccııs With Grounded Resistors and Capacitors
    (Beykent Üniversitesi, 2008) Un, Mahmut; Kacar, Firat
    This paper presents a cascadable current-mode (CM) multifunction biquadratic filter circuit. The proposed circuit realizes all five different transfer functions employing only two inverting-type second generation current conveyors (ICCIIs), and capacitors and resistors which all are grounded. Since the output of the proposed filter exhibits high output impedance, it can be directly cascaded to obtain higher order filters without any additional buffers. Moreover, the biquad filter offers low sensitivities and its natural frequency and Q-factor are insensitive to tracking errors of ICCIIs, but gain of the filter depends on the tracking errors. Finally, the theoretical results are verified with PSPICE simulations using CMOS realization of the ICCII.
  • Küçük Resim
    Öğe
    Voltage Type First Order All-Pass Filter Employing Fully Differential Current Feedback Operational Amplifier and Its Application
    (Beykent Üniversitesi, 2008) Un, Mahmut; Kacar, Firat
    A novel voltage mode first order all-pass filter configuration is proposed. The presented circuit uses a single fully differential current feedback operational amplifier (FDCFOA), resistors and a grounded capacitor. High input impedance of the proposed filter enables the circuit to be cascaded without additional buffers.It does not impose any component matching constraint in analog signal processing circuits. Moreover higher order all-pass filter could be achieved by cascading the proposed all-pass sections.In order to demostrate the performance of the proposed filter a new voltage mode oscillator is introduced as an application example. Also the theoretical results are verified with SPICE simulations using a CMOS realization of FDCFOA.