Tongkulboriboon, Seangrawee

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Tongkulboriboon, Seangrawee
Alternative Name
Tongkulboriboon, S.
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Email
seangrawee.to@kmitl.ac.th

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    Item type:Publication,
    A novel high Q-bandpass filter employing a few grounded passive components
    (2005-12-01)
    Tongkulboriboon, Seangrawee
    ;
    Petchakit, Wijittra
    ;
    Pawarangkoon, Prajuab
    ;
    Kiranon, Wiwat
    This paper proposes a novel current mode high Q bandpass filter with electronically tunable features based on second generation current controlled conveyor (CCCII). The configuration of the proposed circuit Is simple and very attractive for monolithic circuits owing to using a few grounded passive components. The center frequency and pole-Q can be Independently adjusted via dc bias currents of CCCIIs. The proposed filter Is verified by SPICE simulations and the results are given In order to confirm the validity of the proposed circuits. © 2005 IEEE.
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    Item type:Publication,
    Externally linear current amplifiers
    (2007-06-01)
    Tongkulboriboon, S.
    ;
    Pawarangkoon, P.
    ;
    Kiranon, W.
    This paper describes a method to implement externally linear internally non-linear (ELIN) current amplifiers. Two novel schemes of ELIN current amplifier circuits are proposed, including hyperbolic sine (SINH) and hyperbolic tangent (TANH) circuits. The obtained linear input-current ranges of SINH and TANH circuits are 400 Ap-p with total harmonic distortion (THD) less than 2% and 140 Ap-p with THD less than 0.2%, respectively, both at the input frequency 1 kHz. Also, the current gains of the proposed circuits can be varied either in positive or negative region by adjusting the dc bias currents. Their current gains are tunable in the range of -10 A/A to 10 A/A and insensitive to temperature. Simulation results show that the performance of the circuits are as good as expected.