Wongtaychatham, Chariya

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Wongtaychatham, Chariya
Alternative Name
Wongtaychatham, C.
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Email
chariya.wo@kmitl.ac.th

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    Item type:Publication,
    Boosting the Quality Factor of the Shadow Bandpass Filter
    (2022-09-30)
    Buakaew, Seangrawee
    ;
    Wongtaychatham, Chariya
    This paper proposes a new method to increase the quality factor of the shadow bandpass filter. The proposed circuit topology is simple, with the use of conventional biquad cell along with external amplifiers. The major advantageous feature is that the quality factor of the filter is boosted up whereas the gain of the external amplifier is significantly reduced. Moreover, the presented idea can be applied to the shadow filter in both current and voltage modes. The proposed scheme is justified via circuit performance. The performance is compared with the previous research works in the same arena. The results show that a feedback signal and a properly chosen gain incredibly boost up the quality factor of the shadow bandpass filter. Simulations by PSpice using 0.18-μm CMOS-level parameters confirm the validity of the proposed work.
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    Shadow bandpass filter with Q-improvement
    (2019-07-01)
    Buakaew, Seangrawee
    ;
    Narksarp, Wipavan
    ;
    Wongtaychatham, Chariya
    A new architecture of the shadow bandpass filters with the quality factor improvement is proposed. The presented idea employs external amplifiers cooperating with the classical biquad cell resulting in convenient electronic tunability of the characteristic frequency and the quality factor. The scheme obtains the benefit of the quality factor-improvement via feedback gains of the external amplifiers. The theory is verified by PSPICE simulation using 0.18 μm CMOS technology model parameters.