Yazar "Herencsar, Norbert" seçeneğine göre listele

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    A New Compact CMOS Realization of Sinusoidal Oscillator Using a Single Modified CBTA
    (BRUNO UNIV TECHNOL, DEPT RADIO ELECTRONICS, 2011) Herencsar, Norbert; Koton, Faroslav; Vrba, Kamil; Lahiri, Abhirup; Ayten, Umut E.; Sagbas, Mehmet; Dufek, I; Dusek, M; Fedra, Z; Fryza, T; Jakubova, I; Polak, L; Sebestova, D; Slanina, M; Sramek, P; Vsetula, P; Wolansky, D; Zachar, J
    In this paper, a new compact realization of sinusoidal oscillator using modified current backward transconductance amplifier (MCBTA) is reported. The proposed circuit employs a single MCBTA and four passive components including two grounded capacitors. The circuit provides completely de-coupled condition of oscillation (CO) of the frequency of oscillation (FO), i.e. no term in the CO is present in the FO and vice versa. Both the CO and FO are independently tunable by two different grounded resistors. The FO is also tunable by means of the transconductance and thereby is electronically tunable. SPICE simulation results have confirmed the workability of the proposed circuit.
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    Voltage-Mode Multiphase Sinusoidal Oscillators Using CBTAs
    (IEEE, 2012) Sagbas, Mehmet; Ayten, Umut Engin; Herencsar, Norbert; Minaei, Shahram
    A voltage-mode multiphase sinusoidal oscillator (MSO) structure using current backward transconductance amplifier (CBTA) is presented. The oscillator can generate n voltage signals (n being even or odd) equally spaced in phase. n+1 CBTAs, n grounded capacitor and a grounded resistor are used for nth-state oscillator. The oscillation frequency can be independently controlled through transconductance (g(m)) of the CBTAs which are adjustable via bias currents. The effects caused by the non-ideality of the CBTA on the oscillation frequency and condition have been analyzed. The performance of the proposed circuit is demonstrated on a third-stage MSO by using PSPICE simulations based on the 0.25 mu m TSMC level-7 CMOS technology parameters.