17 research outputs found

    A simple current-mode Schmitt trigger employing only single MO-CTTA

    Full text link
    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 249mW at Âą5V supply voltages. I

    Realization of electronically tunable voltage-mode/current-mode quadrature sinusoidal oscillator using ZC-CG-CDBA

    Get PDF
    a b s t r a c t This paper presents a first of its kind canonic realization of active RC (ARC) sinusoidal oscillator with non-interactive/independent tuning laws, which simultaneously provides buffered quadrature voltage outputs and explicit quadrature current outputs. The proposed circuit is created using a new active building block, namely the Z-copy controlled-gain current differencing buffered amplifier (ZC-CG-CDBA). The circuit uses three resistors and two grounded capacitors, and provides independent/non-interactive control of the condition of oscillation (CO) and the frequency of oscillation (FO) by means of different resistors. Other advantageous features of the circuit are the inherent electronic tunability of the FO via controlling current gains of the active elements and the suitability to be employed as a low-frequency oscillator. A non-ideal analysis of the circuit is carried out and experimental results verifying the workability of the proposed circuit are included

    āļāļēāļĢāđ€āļœāļĒāđāļžāļĢāđˆāļœāļĨāļ‡āļēāļ™āļ—āļēāļ‡āļ§āļīāļŠāļēāļāļēāļĢāđƒāļ™āļ§āļēāļĢāļŠāļēāļĢāļ§āļīāļŠāļēāļāļēāļĢāļžāļĢāļ°āļˆāļ­āļĄāđ€āļāļĨāđ‰āļēāļžāļĢāļ°āļ™āļ„āļĢāđ€āļŦāļ™āļ·āļ­: āļ‚āđ‰āļ­āļĄāļđāļĨāļžāļ·āđ‰āļ™āļāļēāļ™āđāļĨāļ°āļ‚āđ‰āļ­āļ„āļ§āļĢāļ„āļģāļ™āļķāļ‡A Publication in Journal of King Mongkut’s University of Technology North Bangkok: Basic Information and Consideration

    Get PDF
    āļ§āļēāļĢāļŠāļēāļĢāļ§āļīāļŠāļēāļāļēāļĢāļžāļĢāļ°āļˆāļ­āļĄāđ€āļāļĨāđ‰āļēāļžāļĢāļ°āļ™āļ„āļĢāđ€āļŦāļ™āļ·āļ­ āđ€āļ›āđ‡āļ™āļ§āļēāļĢāļŠāļēāļĢāļ—āļĩāđˆāļ”āļģāđ€āļ™āļīāļ™āļāļēāļĢāđ‚āļ”āļĒāļāļ­āļ‡āļŠāđˆāļ‡āđ€āļŠāļĢāļīāļĄāļ§āļīāļŠāļēāļāļēāļĢ āļŠāļģāļ™āļąāļāļ‡āļēāļ™āļ­āļ˜āļīāļāļēāļĢāļšāļ”āļĩ āļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļžāļĢāļ°āļˆāļ­āļĄāđ€āļāļĨāđ‰āļēāļžāļĢāļ°āļ™āļ„āļĢāđ€āļŦāļ™āļ·āļ­ āļˆāļ™āļ–āļķāļ‡āļ›āļąāļˆāļˆāļļāļšāļąāļ™āļ”āļģāđ€āļ™āļīāļ™āļāļēāļĢāđ€āļ›āđ‡āļ™āļ›āļĩāļ—āļĩāđˆ 32 āļ™āļąāļšāđ€āļ›āđ‡āļ™āļ§āļēāļĢāļŠāļēāļĢāļ§āļīāļŠāļēāļāļēāļĢāļ§āļēāļĢāļŠāļēāļĢāļŦāļ™āļķāđˆāļ‡āļ—āļĩāđˆāļ”āļģāđ€āļ™āļīāļ™āļāļēāļĢāļĄāļēāļ­āļĒāđˆāļēāļ‡āļĒāļēāļ§āļ™āļēāļ™ āđāļĨāļ°āđ€āļ›āđ‡āļ™āļ§āļēāļĢāļŠāļēāļĢāļ—āļĩāđˆāļ–āļđāļāļˆāļąāļ”āļ­āļĒāļđāđˆāđƒāļ™āļāļĨāļļāđˆāļĄāļ—āļĩāđˆ 1 (āļ§āļēāļĢāļŠāļēāļĢāļ—āļĩāđˆāļĄāļĩāļ„āļ°āđāļ™āļ™āļ›āļĢāļ°āđ€āļĄāļīāļ™āļ„āļļāļ“āļ āļēāļžāđ€āļāļīāļ™ 16 āļ„āļ°āđāļ™āļ™ āļˆāļēāļāļ„āļ°āđāļ™āļ™āđ€āļ•āđ‡āļĄ 20 āļ„āļ°āđāļ™āļ™) āļ‚āļ­āļ‡āļĻāļđāļ™āļĒāđŒāļ”āļąāļŠāļ™āļĩāļāļēāļĢāļ­āđ‰āļēāļ‡āļ­āļīāļ‡āļ§āļēāļĢāļŠāļēāļĢāđ„āļ—āļĒ (Thai Citation Index, TCI) āđ€āļ›āđ‡āļ™āļ§āļēāļĢāļŠāļēāļĢāļ—āļĩāđˆāđ€āļœāļĒāđāļžāļĢāđˆāļœāļĨāļ‡āļēāļ™āļ—āļēāļ‡āļ§āļīāļŠāļēāļāļēāļĢāļ—āļēāļ‡āļ”āđ‰āļēāļ™āļ§āļīāļ—āļĒāļēāļĻāļēāļŠāļ•āļĢāđŒāđāļĨāļ°āđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩ āļĢāļ§āļĄāļ–āļķāļ‡āļ”āđ‰āļēāļ™āļ§āļīāļĻāļ§āļāļĢāļĢāļĄāļĻāļēāļŠāļ•āļĢāđŒ āļ§āļīāļ—āļĒāļēāļĻāļēāļŠāļ•āļĢāđŒāļ›āļĢāļ°āļĒāļļāļāļ•āđŒ āļ­āļļāļ•āļŠāļēāļŦāļāļĢāļĢāļĄāđ€āļāļĐāļ•āļĢ āđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļŠāļēāļĢāļŠāļ™āđ€āļ—āļĻ āļŠāļ–āļēāļ›āļąāļ•āļĒāļāļĢāļĢāļĄ āđāļĨāļ°āļ§āļīāļŠāļēāļāļēāļĢāļ‚āļąāđ‰āļ™āļŠāļđāļ‡āļ—āļĩāđˆāđ€āļāļĩāđˆāļĒāļ§āļ‚āđ‰āļ­āļ‡āļāļąāļšāļ˜āļļāļĢāļāļīāļˆāđāļĨāļ°āļ­āļļāļ•āļŠāļēāļŦāļāļĢāļĢāļĄ āļœāļĨāļ‡āļēāļ™āļ§āļīāļŠāļēāļāļēāļĢāļ—āļĩāđˆāļĢāļąāļšāļ•āļĩāļžāļīāļĄāļžāđŒāđ€āļ›āđ‡āļ™āļšāļ—āļ„āļ§āļēāļĄāļ§āļīāļˆāļąāļĒ āđāļĨāļ°āļšāļ—āļ„āļ§āļēāļĄāļ§āļīāļŠāļēāļāļēāļĢāļ—āļĩāđˆāđ€āļ‚āļĩāļĒāļ™āļ”āđ‰āļ§āļĒāļ āļēāļĐāļēāđ„āļ—āļĒ āļŦāļĢāļ·āļ­āļ āļēāļĐāļēāļ­āļąāļ‡āļāļĪāļĐ āļĄāļĩāļāļēāļĢāđ€āļœāļĒāđāļžāļĢāđˆāļ—āļąāđ‰āļ‡āđƒāļ™āđāļšāļšāļĢāļđāļ›āđ€āļĨāđˆāļĄāđāļĨāļ°āļ­āļ­āļ™āđ„āļĨāļ™āđŒ āđ‚āļ”āļĒāļāļģāļŦāļ™āļ”āļˆāļąāļ”āļ—āļģāļ›āļĩāļĨāļ° 4 āļ‰āļšāļąāļš āđ€āļĄāļ·āđˆāļ­āļšāļ—āļ„āļ§āļēāļĄāļœāđˆāļēāļ™āļāļēāļĢāļ›āļĢāļ°āđ€āļĄāļīāļ™āļ‚āļąāđ‰āļ™āļ•āđ‰āļ™āļˆāļēāļāļšāļĢāļĢāļ“āļēāļ˜āļīāļāļēāļĢ āļšāļ—āļ„āļ§āļēāļĄāļˆāļ°āđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāļ›āļĢāļ°āđ€āļĄāļīāļ™āļˆāļēāļāļœāļđāđ‰āļ—āļĢāļ‡āļ„āļļāļ“āļ§āļļāļ’āļīāļ āļēāļĒāļ™āļ­āļāļˆāļēāļāļŦāļĨāļēāļāļŦāļĨāļēāļĒāļŠāļ–āļēāļšāļąāļ™ āļˆāļģāļ™āļ§āļ™ 3 āļ—āđˆāļēāļ™ āļ›āļąāļˆāļˆāļļāļšāļąāļ™āļ§āļēāļĢāļŠāļēāļĢāļ§āļīāļŠāļēāļāļēāļĢāļžāļĢāļ°āļˆāļ­āļĄāđ€āļāļĨāđ‰āļēāļžāļĢāļ°āļ™āļ„āļĢāđ€āļŦāļ™āļ·āļ­āđ„āļ”āđ‰āļĢāļąāļšāļ„āļ§āļēāļĄāļŠāļ™āđƒāļˆāļˆāļēāļāļ™āļąāļāļ§āļīāļˆāļąāļĒāļ­āļĒāđˆāļēāļ‡āđāļžāļĢāđˆāļŦāļĨāļēāļĒ āļˆāļēāļāļ‚āđ‰āļ­āļĄāļđāļĨāļāļēāļĢāđ€āļœāļĒāđāļžāļĢāđˆāđƒāļ™āļ›āļĩ 2564 āļĄāļĩāļŠāļąāļ”āļŠāđˆāļ§āļ™āļšāļ—āļ„āļ§āļēāļĄāļ§āļīāļˆāļąāļĒāļˆāļēāļāļ āļēāļĒāļ™āļ­āļāļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāļŠāļđāļ‡āļ–āļķāļ‡ 85.7% āļˆāļēāļāļˆāļģāļ™āļ§āļ™āļšāļ—āļ„āļ§āļēāļĄāļ—āļĩāđˆāđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāđ€āļœāļĒāđāļžāļĢāđˆāļ—āļąāđ‰āļ‡āļŦāļĄāļ” 70 āļšāļ—āļ„āļ§āļēāļĄ āļŦāļēāļāļžāļīāļˆāļēāļĢāļ“āļēāļˆāļēāļāļˆāļģāļ™āļ§āļ™āļšāļ—āļ„āļ§āļēāļĄāļ—āļĩāđˆāļĄāļĩāļāļēāļĢāļŠāđˆāļ‡āđ€āļ‚āđ‰āļēāļĄāļēāđƒāļ™āļĢāļ°āļšāļšhttp://ojs.kmutnb.ac.th/index.php/kjournalāļ›āļĢāļ°āļĄāļēāļ“ 280 āļšāļ—āļ„āļ§āļēāļĄ āļ§āļēāļĢāļŠāļēāļĢāļĄāļĩāļ­āļąāļ•āļĢāļēāļāļēāļĢāļ•āļ­āļšāļĢāļąāļšāļ­āļĒāļđāđˆāļ—āļĩāđˆāļ›āļĢāļ°āļĄāļēāļ“ 60% āļ—āļģāđƒāļŦāđ‰āļĄāļĩāļˆāļģāļ™āļ§āļ™āļšāļ—āļ„āļ§āļēāļĄāļ—āļĩāđˆāđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāļ•āļ­āļšāļĢāļąāļšāđƒāļ™āļŦāļ™āļķāđˆāļ‡āļ›āļĩ āļ­āļĒāļđāđˆāļ—āļĩāđˆāļ›āļĢāļ°āļĄāļēāļ“ 170 āļšāļ—āļ„āļ§āļēāļĄ āđ€āļĄāļ·āđˆāļ­āļžāļīāļˆāļēāļĢāļ“āļēāļ‚āđ‰āļ­āļĄāļđāļĨāļ‚āđ‰āļēāļ‡āļ•āđ‰āļ™āļˆāļ°āļžāļšāļ§āđˆāļēāđƒāļ™āđāļ•āđˆāļĨāļ°āļ›āļĩāļˆāļ°āļĄāļĩāļšāļ—āļ„āļ§āļēāļĄāļ—āļĩāđˆāđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāļ•āļ­āļšāļĢāļąāļšāļĢāļ­āļāļēāļĢāđ€āļœāļĒāđāļžāļĢāđˆāđƒāļ™āļ›āļĩāļ–āļąāļ”āđ„āļ›āļ­āļĒāļđāđˆāļ›āļĢāļ°āļĄāļēāļ“ 100 āļšāļ—āļ„āļ§āļēāļĄ āļŠāđˆāļ‡āļœāļĨāđƒāļŦāđ‰āđƒāļ™āļ›āļąāļˆāļˆāļļāļšāļąāļ™āļ—āļĩāđˆāđ€āļ‚āļĩāļĒāļ™āļšāļ—āļ„āļ§āļēāļĄāļšāļĢāļĢāļ“āļēāļ˜āļīāļāļēāļĢāļ›āļĢāļīāļ—āļąāļĻāļ™āđŒāļ™āļĩāđ‰ (āļāļąāļ™āļĒāļēāļĒāļ™ 2564) āļŦāļēāļāļšāļ—āļ„āļ§āļēāļĄāđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāļ•āļ­āļšāļĢāļąāļšāđƒāļ™āļŠāđˆāļ§āļ‡āļ™āļĩāđ‰āļˆāļ°āđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāļ•āļĩāļžāļīāļĄāļžāđŒāđ€āļœāļĒāđāļžāļĢāđˆāđƒāļ™āļ‰āļšāļąāļšāļ•āđ‰āļ™āļ›āļĩ 256

    A Transconductance-Mode Multifunction Filter with High Input and High Output Impedance Nodes Using Voltage Differencing Current Conveyors (VDCCs)

    Get PDF
    The design of transconductance-mode multifunction biquad filter containing three input voltage nodes and single-output current node is proposed. Its circuit principle is emphasized on employing Voltage Differencing Current Conveyor (VDCC) to be an active building block. The proposed filter description uses three VDCCs co-working with two grounded capacitors and three grounded resistors. The synthesis of the proposed multifunction filter is based on avoidance of using multiple-output active elements to achieve commercially available integrated circuits for practical implementation. Additionally, without multiple-output active element, it can alleviate current tracking error from the current mirrors used in output ports. It also decreases the amounts of the transistors inside the active elements. The proposed multifunction filter offers all 5 filter functions, which are non-inverting Low-Pass (LP), non-inverting High-Pass (HP), non-inverting Band-Pass (BP), non-inverting Band-Reject (BR) and also non-inverting All-Pass (AP) functions from same circuit topology under different circuit condition for input signals. Furthermore, the natural frequency for all filtering responses is independently achieved from the bandwidth or the quality factor of the proposed filter. For cascade-able connectivity, the output current port indeed provides a high impedance. In addition, the magnitude of the output current for all filtering functions can be resistively adjusted. The consideration for non-ideal case of the presented multifunction filter is also analyzed. The simulation and experimental results of the presented transconductance multifunction biquad filter based on VDCC practically implemented by the commercially available ICs, LM13700 and AD844 can validate the theoretical anticipation.Ostrav
    corecore