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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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    Active URC sinusoidal oscillator
    (2014-01-01)
    Theingjit, Sasitaporn
    ;
    Wachirarattanapornkul, Sorapong
    ;
    Tangsrirat, Worapong
    This article presents a voltage mode sinusoidal oscillator using uniformly distributed RC line (URC) and voltage gain amplifier as active elements. The outputs of sinusoidal waveform with 0° from the configuration. The oscillation condition and oscillation frequency (ω<inf>0</inf>) of the proposed oscillator circuit are tunable by the amplifier gain (K) and the resistance ratio (β). The simulation results by MATLAB and PSPICE are good agreement with the theoretical analysis and also show that very low harmonic distortion is obtained. The proposed circuit is suitable for fabricating in LSI technology. © 2014 IEEE.
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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.
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    The design of an active band pass filter using uniformly distributed RC line
    (2002-01-01)
    Phantonglow, R.
    ;
    Janchitrapongvej, K.
    ;
    Tangtisanon, P.
    This paper describes the realization of an active band pass filter circuit using a uniformly distributed RC line (URC). The proposed circuit structures resemble the Renz's band pass filter circuit, which consist of three URCs and a single positive gain amplifier. From the experimental results by Matlab and Pspice programs, it is showed that the behavior of the proposed band pass filter circuit gives a good narrow band and low sensitivity, better than Renz's band pass filter circuit.