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Author: search.filters.author.Janchitrapongvej, KanokSubject: search.filters.subject.URC

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    Synthesis of Video Gain Equalizer via Distributed circuits
    (2025-01-01)
    Chutchavong, Vanvisa
    ;
    Pirajnanchai, Virote
    ;
    Rattanathanawan, Pongpan
    ;
    Ngammongkolwong, Sudasawan
    ;
    Puntapa, Vorawut
    This paper presents a linear luminance and chrominance gain equalizer in video waveform transmission. Practically, the distributed devices have physical characteristics similar to the transmission line. Therefore, it can be employed to function in approximately as a passive lumped element. For this purpose, a novel transformation can be realized on equalizer using commemorated passive and active filters with uniformly distributed URC lines. In this paper we introduce two types of gain equalizers. The first type consists of resistive, conductive and capacitive, known as uniform GCR elements. The second type approximated by the uniformly distributed RC transfer function. As the results the proposed gain equalizer prove in equalizing both the luminance and chrominance gain distortions correction. From the simulation results, it is shown that the proposed distributed circuit gives good amplitude chrominance characteristic for both types of luminance gain equalizers.
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    Design all-pass transfer function configuration using a notch distributed RC network
    (2007-12-01)
    Pirajnanchai, Virote
    ;
    Luangphakorn, Supachai
    ;
    Janchitrapongvej, Kanok
    In this paper describers a new and interesting notch distributed RC networks configuration that realizes an all-pass network function is proposed. The circuit is presented with which an all-pass transfer function of arbitrary order, having simple negative real poles, has been realized by combining the output of notch distributed RC networks with a portion of its input in a differential amplifier. The experimental results for such an all-pass function is also indicated. This network circuit has the advantage that the gain constant of all-pass function may be varied by varying the gain of differential amplifier.