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Author: search.filters.author.Lamun, PanitSubject: search.filters.subject.mixed-mode circuit

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    Mixed-mode quadrature oscillator using a single DDCCTA and grounded passive components
    (2015-01-01)
    Phatsornsiri, Punnavich
    ;
    Lamun, Panit
    ;
    Kumngern, Montree
    A new mixed-mode quadrature oscillator using a single differential difference current conveyor transconductance amplifier (DDCCTA), two grounded resistors, and two grounded capacitors is presented. The proposed circuit provides both quadrature voltage and quadrature current outputs simultaneously. The condition of oscillation (CO) and frequency of oscillation (FO) of the circuit are orthogonally controllable. The circuit is beneficial to monolithic integrated circuit implementation by using all grounded passive components. Moreover, the active and passive sensitivities of the proposed configuration are low. The validity of the proposed oscillator has been established by PSPICE simulations using MIETEC 0.5 μm CMOS technology.
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    Allpass section-based mixed-mode quadrature sinusoidal oscillator
    (2013-01-01)
    Kumngern, Montree
    ;
    Lamun, Panit
    This paper presents a new electronically tunable mixed-mode quadrature sinusoidal oscillator using new allpass section as an building block. The oscillator is consisted of two allpass sections. Each allpass section employs one current-controlled current differencing transconductance amplifier and one grounded capacitor. The condition of oscillation and the frequency of oscillation can be controlled independently and electronically by adjusting the bias currents. The oscillator also offers two explicit quadrature voltage and quadrature current outputs into a single topology. The workability of the proposed structure is verified by PSPICE simulators based on 0.25 μm TSMC CMOS process. © 2013 IEEE.
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    A new mixed-mode quadrature oscillator using a single CCCDTA
    (2011-08-12)
    Lamun, Panit
    ;
    Phasukkit, Pattarapong
    ;
    Kumngern, Montree
    ;
    Dejhan, Kobchai
    This paper presents a new current-controlled mixed-mode quadrature oscillator using only a current controlled current differencing transconductance amplifier (CCCDTA), two grounded capacitors and one MOS resistor. The structure is beneficial to monolithic integrated circuit implementation. The proposed circuit provides two quadrature voltage outputs and two quadrature current outputs. The quadrature current outputs also offer the feature of high output impedance. The oscillation condition and the oscillation frequency of the oscillator are independently controllable. PSPICE simulation results which confirm the theoretical predictions are also given. © 2011 IEEE.