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Subject: search.filters.subject.Square-root extractor

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    Item type:Publication,
    Simple square-rooting voltage-to-frequency converter using opamps
    (2010-12-01)
    Maneechukate, Thongchai
    ;
    Yaonun, Tawatchai
    ;
    Kamsri, Thawatchai
    ;
    Julsereewong, Amphawan
    ;
    Riewruja, Vanchai
    This paper presents a simple method based on commercially available operation amplifiers (Opamps) for realizing the square-rooting voltage-to-frequency converter (VFC). The realization of square-root function is provided through the use of the opamp supply-current sensing, which utilizes an inherent quadratic characteristic of the opamp class-AB output state. Experimental results verifying the performances of the proposed square-rooting VFC are included. ©ICROS.
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    Simple square-root extractor using op amps
    (2008-12-01)
    Kamsri, Thawatchai
    ;
    Julsereewong, Prasit
    ;
    Riewruja, Vanchai
    This paper presents the simple and inexpensive method to implement a square-root extractor for voltage input signal. The proposed extractor is based on the use of two operational amplifiers (op amps) as only active elements. The proposed technique employs the op amp supply-current sensing to achieve an inherently quadratic characteristic. The low-output distortion in output signal can be achieved. Experimental results verifying the characteristic of the proposed circuit are also included.