KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Somdunyakanok, MontriSubject: search.filters.subject.Tunable

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Accurate tunable current-mirror and its applications
    (2008-12-01)
    Somdunyakanok, Montri
    ;
    Pattanathadapong, Thanate
    ;
    Prommee, Pipat
    This paper proposes an accurate electronically tunable current-mirror circuit based on translinear type-A (Polarities Alternative) topology. This circuit is realized by only 6 transistors with BJT technology. A shunt-feedback buffer principle is used in order to regulate its emitter voltage of translinear part. For current mirror behavior, output and input currents are identical with a small error. Current-gain can be obtained by adjusting the ratio of the 2 particular current sources. This proposed circuit is using only 6 transistors for the simple structure. The analysis of input, output resistance and current-gain are depicted. An extra transistor is added for maintained the transfer minimum error which is also proposed. The constant bandwidth more than 40MHz of various current-gains can be obtained. From current output mathematic function, several applications such as current multiplier, current divider and tunable current mirror are certainly performed. Other applications are raised to confirm realistic applicable including squaring and square- rooting circuits. All characteristics and performances are carried out by PSpice for confirm their well operations. © 2008 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Low-component-count current-mode universal filter based on active-only lossy and lossless integrators
    (2008-12-01)
    Somdunyakanok, Montri
    ;
    Angkeaw, Krit
    ;
    Prommee, Pipat
    ;
    Kumngern, Montree
    An universal current-mode active-only filter using the biquadratic transfer function is proposed. The proposed circuit is realized by lossy and lossless integrators with minimize active components count without external passive elements. The different kinds of filter functions as lowpass, highpass, bandpass and band-reject response can be obtained without changing circuit topology. The proposed circuit implementation is realized by using MOS transistors, CMOS MO-OTAs, and CMOS OPAMPs. The parameters ω<inf>p</inf> can be tuned electronically through adjusting the transconductance gains of the OTA or electronic resistor power supplies. The simulation results are given by PSpice. © 2008 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Realization of OTA-C current-mode universal filter based on two type integrators loop
    (2007-12-01)
    Prommee, Pipat
    ;
    Somdunyakanok, Montri
    ;
    Angkeaw, Krit
    ;
    Dejhan, Kobchai
    A universal current-mode active filter based on 2 types of integrator, lossy and lossless integrators, is presented. The biquadratic transfer function is obtained by the two integrators loop. The proposed circuit employs only 2 multiple output OTAs (MO-OTA) and 3 capacitors. The parameter Q<inf>P</inf> can be wide-range tuned independent from the ω<inf>P</inf> either changing of capacitor and transconductance gains. Moreover, the four different kind filter functions as lowpass, highpass, bandpass and band-reject response can be also obtained without changing circuit topology. The parameters ω<inf>p</inf> can be electronically tuned through adjusting the transconductance gains of the OTAs. The simulation results have been carried out by PSpice. © 2007 IEEE.