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Author: search.filters.author.Mongkolwai, PratyaSubject: search.filters.subject.Current follower transconductance amplifier (CFTA)

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    Three-input single-output current-mode biquadratic filter with high-output impedance using a single current follower transconductance amplifier
    (2017-08-01)
    Mongkolwai, Pratya
    ;
    Pukkalanun, Tattaya
    ;
    Tangsrirat, Worapong
    The circuit configuration for realizing a canonical current-mode biquad filter with three inputs and single output is introduced. The introduced filter employs a single current follower transconductance amplifier (CFTA) and a minimum of passive components, i.e., one resistor and two grounded capacitors. It is capable of generating all the five standard biquadratic filtering functions and suitable for current-mode cascading by possessing high-output impedance. Also, the proposed filter can be tuned electronically by an external bias current of the CFTA. The circuit is analyzed for the non-idealities of the used CFTA and possesses attractive low sensitivity performance. PSPICE simulation results are found to be in good agreement with the presented theory.
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    Insensitive High-Output Impedance Current-Mode Biquad with a Single Current Follower Transconductance Amplifier
    (2017-01-01)
    Mongkolwai, Pratya
    ;
    Pukkalanun, Tattaya
    ;
    Tangsrirat, Worapong
    The circuit configuration for realizing a canonical current-mode biquad filter with three inputs and one output is introduced. The introduced filter employs a single current follower transconductance amplifier (CFTA) and a minimum of passive components, i.e., one resistor and two grounded capacitors. It is capable of generating all the five standard biquadratic filtering functions and suitable for current-mode cascading by possessing high-output impedance. Also, the proposed filter can be tuned electronically by an external bias current of the CFTA. The circuit is analyzed for the non-idealities of the used CFTA and possesses attractive low sensitivity performance. PSPICE simulation results are found to be in good agreement with the presented theory.