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Author: search.filters.author.Petchmaneelumka, WandeeSubject: search.filters.subject.Peak detector

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    Enhanced sinusoidal amplitude detector for fast response applications
    (2013-03-28)
    Kaewpoonsuk, Anucha
    ;
    Poonart, Krerkkit
    ;
    Petchmaneelumka, Wandee
    ;
    Riewruja, Vanchai
    In this paper, an enhanced sinusoidal-amplitude detector suitable for fast response applications is proposed. Implementation method based on commercially available devices employs a novel control signal generator to improve operation speed of previously reported sinusoidal amplitude detector. The control signal generator used consists of a time-delay circuit, AND logic gate, and three comparators. The enhanced amplitude detector provides faster amplitude detection as well as smaller operation error for amplitude input changes. Experimental results verify a good agreement with theoretical expectation. © 2013 ICIC International.
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    A current signal CMOS sample-and-hold circuit
    (2007-12-01)
    Luangpol, Amata
    ;
    Petchmaneelumka, Wandee
    ;
    Kamsri, Thawatchai
    ;
    Riewruja, Vanchai
    This article presents a current signal sample-and-hold (S/H) circuit using 0.5μm CMOS technology. A current minimum circuit is used to sample the input signal in place of a sampling switch used in the conventional S/H circuit. The current peak detector is used to hold the signal from the minimum circuit in the "hold" state. The proposed configuration is adopted effectively to cancel switch feedthrough error. The performances of the proposed circuit are demonstrated using the PSPICE analog simulation program. Simulation results show the sampling frequency up to 100MHz and high accuracy. © ICROS.