P. Silapan

King Mongkut's University of Technology North Bangkok, Krung Thep, Bangkok, Thailand

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Publications (12)0 Total impact

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    ABSTRACT: This paper presents current-mode first-order allpass filter using three operational transconductance amplifiers (OTAs) and grounded capacitor. The use of grounded capacitor makes the circuit more suitable for integrated circuit implementation. The current gain and phase shift can be independently controlled with electronic method. The circuit has high output impedance which enables easy cascading in the current mode circuits. The PSpice simulation results are depicted. The given results agree well with the theoretical anticipation.
    Communications and Information Technologies (ISCIT), 2013 13th International Symposium on; 01/2013
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    ABSTRACT: ewave generator based on MO-CCCCTAs (Multiple output current controlled current conveyor transconductance am plifiers) is presented in this paper. The circuit description is very simple, its construction consists of 2 MO-CCCCTAs and 1 grounded capacitor without any external resistor. The output frequency and amplitude can be electronicallyli ndependently tuned via corresponding input bias currents. With mentioned features, it is very suitable to realize in a monolithic chip. The PSpice simulation results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 1.62mW at ±1.5V power supply.
    01/2011;
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    ABSTRACT: This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multiple output current through transconductance amplifiers). The circuit description is very simple, its construction consists of 2 MO-CTTAs and 1 grounded capacitor without any external resistor. The output frequency and amplitude can be independently and electronically adjusted. With mentioned features, it is very suitable to realize in a monolithic chip. The PSPICE simulation results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 5.73mW at ±1.5V power supply.
    Electrical Engineering/Electronics Computer Telecommunications and Information Technology (ECTI-CON), 2010 International Conference on; 06/2010
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    P. Silapan, M. Siripruchyanun
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    ABSTRACT: A new current-mode Schmitt trigger based on MO-CTTA (Multiple output current through transconductance amplifier) is presented in this article. The circuit description is very simple, its construction consists of only single MO-CTTA. The hysteresis and amplitude of the output current can be tuned independently/electronically. With mentioned features, it is very suitable to realize in a monolithic chip. The PSPICE simulation and experimental results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 249 mW at plusmn5 V supply voltages.
    Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2009. ECTI-CON 2009. 6th International Conference on; 06/2009
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    ABSTRACT: This article presents a current-mode quadrature oscillator using current controlled current feedback amplifiers (CC-CFAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be orthogonally controlled via input bias currents. The circuit description is very simple, consisting of merely 2 CC-CFAs, one grounded and floating capacitors. Without any external resistors and using a few number of external passive components, the proposed circuit is then suitable for IC architecture. The proposed circuit, due to high output impedances, enabling easy cascading in current-mode signal processing. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The power consumption is approximately 327 muW at plusmn1.5 V supply voltages.
    Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2009. ECTI-CON 2009. 6th International Conference on; 06/2009
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    ABSTRACT: This article presents a basic current-mode building block for analog signal processing, namely current conveyor transconductance amplifier (CCTA) using the commercially available ICs. The performances are examined through PSPICE simulations and experiment, displaying usabilities of the new active element. The description includes some examples as a voltage-mode universal biquad filter, a grounded inductance, a current-mode multiplier and oscillator. They occupy only a single CCTA.
    Intelligent Signal Processing and Communications Systems, 2008. ISPACS 2008. International Symposium on; 03/2009
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    ABSTRACT: A circuit which can function both as quadrature oscillator and as a universal biquad filter (low-pass, high-pass, band-pass, band-reject and all-pass functions) is introduced in this paper. Working as quadrature oscillator, the oscillation condition and oscillation frequency can be adjusted independently with the input bias currents. Functioning as a universal biquad filter, the quality factor and natural frequency can be tuned orthogonally via the input bias currents. The proposed circuit can work as either a quadrature oscillator or a universal biquad filter without changing circuit topology. The proposed circuit description is very simple, consisting of merely 2 current controlled current conveyor transconductance amplifiers (CCCCTAs) and 2 grounded capacitors. Without any external resistors and using only grounded elements, this circuit is thus suitable for IC architecture. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The maximum power consumption is approximately 3.78 mW at plusmn1.5 V power supplies.
    Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on; 01/2009
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    ABSTRACT: This article introduces a novel version for implementing current-mode precision full-wave rectifier. The features of the proposed circuit are that: it can rectify and amplify current signal with controllable output magnitude via an input bias current: the output current is free from temperature variation. In addition, direction of the output current signal can be arbitrarily controlled by controlled current in the circuit to be either positive or negative without changing circuit topology, which differs from the previous literatures. Circuit description merely consists of 3 BiCMOS CCCDBAs, without any passive component. The performances of the proposed circuit are investigated through PSPICE. They show that the proposed circuit can function as a current-mode precision full-wave rectifier, where input current range from -240 muA to 240 muA can be achieved at plusmn1.5 V power supplies. The maximum power consumption is 11.8 mW. In addition, the highest frequency is restricted at up to megahertz range.
    Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on; 01/2009
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    ABSTRACT: This article introduces a grounded capacitance multiplier employing current controlled current conveyor transconductance amplifiers (CCCCTAs). The provided capacitor is a grounded element. Its outstanding feature is that the capacitive value can be electronically adjusted by input bias currents of the CCCCTA and is temperature-insensitive. The circuit construction comprises two CCCCTAs, cooperating with a grounded capacitor. The circuit performances are depicted through PSPICE simulations, they show good agreement to theoretical anticipation. Application as a fifth-order Chebyshev low-pass filter is included.
    Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on; 01/2009
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    ABSTRACT: This article presents the modified design for a basic current-mode building block for analog signal processing, named as current controlled current differencing buffered amplifier (CCCDBA). Its parasitic resistances at two current input ports can be controlled by an input bias current. The output current and voltage offsets including power consumption are low compared to ordinary CCCDBA description with same implemented technology. The proposed element is realized in a BiCMOS technology and its performance is examined through PSPICE simulations. In addition, an example as a current-mode multiplier/divider is included. It displays usability of the proposed element.
    Communications and Information Technologies, 2007. ISCIT '07. International Symposium on; 11/2007
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    ABSTRACT: This article presents a quadrature oscillator using current controlled current differencing buffered amplifiers (CCCDBAs) as active elements. The oscillation condition and oscillation frequency can be electronically/orthogonally controlled via input bias currents. The circuit description is very simple, consisting of merely 3 CCCDBAs and 2 grounded capacitors. Without any external resistors and using only grounded elements, the proposed circuit is then suitable for IC architecture. The PSPICE simulation results are depicted, the given results agree well with the theoretical anticipation. The power consumption is approximately 5.93 mW at plusmn2 V supply voltages.
    Communications and Information Technologies, 2007. ISCIT '07. International Symposium on; 11/2007
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    ABSTRACT: This article presents a dual-mode (voltage-mode and current-mode) universal biquadratic filter performing completely standard functions: low-pass, high-pass, band-pass, band-reject and all-pass functions, based on dual-output second-generation current controlled current conveyor (DO-CCCII). The features of the circuit are that: the bandwidth and natural frequency can be tuned electronically via the input bias currents: the circuit description is very simple, consisting of merely 2 DO-CCCIIs and 2 capacitors: the circuit can provide either the voltage-mode or current-mode filter without changing circuit topology. Additionally, each function response can be selected by suitably selecting input signals with digital method. Without any external resistors, the proposed circuit is very suitable to further develop into an integrated circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. The maximum power consumption is approximately 1.81mW at +1.5V supply voltages.
    Communications and Information Technologies, 2007. ISCIT '07. International Symposium on; 11/2007

Publication Stats

36 Citations

Top Journals

Institutions

  • 2010
    • King Mongkut's University of Technology North Bangkok
      • Department of Teacher Training in Electrical Engineering
      Krung Thep, Bangkok, Thailand
  • 2007–2009
    • Uttaradit Rajabhat University
      Krung Thep, Bangkok, Thailand
    • Suan Sunandha Rajabhat University
      Krung Thep, Bangkok, Thailand