Tangsrirat, Worapong

Preferred name

Alternative Name

Tangsrirat, W.

Main Affiliation

School of Engineering

worapong.ta@kmitl.ac.th

Now showing 1 - 10 of 47

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Vdiba-based floating lossless inductance simulator employing a single grounded capacitor
(2016-09-01)
Pimpol, Jirapun
;
Channumsin, Orapin
;
Thongsopa, Chanchai
;
Tangsrirat, Worapong
This paper presents an actively floating lossless inductance simulator based on employing voltage differencing inverting buffered amplifiers (VDIBAs) as new active components. The proposed synthetic inductor employs only two VDIBAs and one grounded capacitor, which is resistorless structure and suitable for integrated circuit design. The realized equivalent inductance is electronically adjustable through the transconductance parameter of the VDIBA. An application example of the proposed tunable floating lossless inductor on the realization of the second-order RLC bandpass filter has been designed and simulated. PSPICE simulation results with standard 0.35 μm BiCMOS process model are also included to demonstrate the utility as well as the workability of the proposed simulator.
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Floating Series RC Impedance Simulator Using Single FB-VDBA
(2020-03-01)
Pimpol, Jirapun
;
Channumsin, Orapin
;
Tangsrirat, Worapong
This article introduces a floating series RC impedance simulator circuit employing a single fully-balanced voltage differencing buffered amplifier (FB-VDBA), as an active element. The presented simulation includes only one FB-VDBA, a single resistor, and a single capacitor. The simulated equivalent series resistance and capacitance values are alterable via the DC biasing current of the FB-VDBA. As a demonstrative application, the presented floating series RC impedance is applied to configuration a 2<sup>nd</sup> order high-pass filter. To evaluate the correctness operation of the presented circuit and its application, the simulation results based upon TSMC 0.25-μm CMOS technology are also contained.
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Voltage differencing gain amplifier-based sinusoidal quadrature oscillator using only two grounded capacitors
(2019-01-01)
Channumsin, Orapin
;
Tangsrirat, Worapong
Background: This article describes the circuit construction of the sinusoidal quadrature oscillator using two Voltage Differencing Gain Amplifiers (VDGAs) as active devices. Methods: Since the presented oscillator circuit uses only two external grounded capacitors as pas-sive elements, it is quite suitable for monolithic integration point of view. The condition of oscilla-tion and the frequency of oscillation are non-interactive, and can be controlled electronically by tun-ing two separate biasing currents. Non-ideal analysis and sensitivity performance are also discussed. Results: The feasibility of the designed oscillator is justified by the PSPICE simulation results based on TSMC 0.35-µm CMOS process parameters. Conclusion: The effects of the VDGA non-idealities on the proposed circuit are also provided, and the computer simulations based on TSMC 0.35-mm CMOS model parameters are included to evalu-ate the performance of the circuit.
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Single CFTA-based dual-mode biquadratic filter
(2018-06-08)
Channumsin, Orapin
;
Photsathian, Thongchai
;
Tangsrirat, Worapong
A scheme consisting of only one current follower transconductance amplifier (CFTA) and four passive components is introduced for realizing the novel dual-mode universal biquadratic filter. The introduced filter can perform either in voltage-mode or current-mode, and can realize the highpass, bandpass and lowpass filter responses simultaneously without needing any element matching constraints. The natural angular frequency (ω<inf>o</inf>) and the quality factor (Q) of the filter can be tuned electronically by the transconductance gain of the CFTA. Computer simulations are used to confirm the workability of the proposed circuit.
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Minimum-component current-mode universal filter
(2011-02-01)
Tangsrirat, Worapong
;
Channumsin, Orapin
This paper describes a current controllable current-mode universal filter with three inputs and one output using multi-output current-controlled current conveyors (MOCCCIIs). The proposed circuit consists of the minimum number of active and passive components, i.e. two MOCCCIIs and two grounded capacitors; simultaneous realization of all the standard filtering functions; independent current-control of the natural angular frequency (ω0) and bandwidth (BW); no requirement of component matching conditions; and low passive and active sensitivities. Copyright © 2011.
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VDIBA-based sinusoidal quadrature oscillator
(2017-01-01)
Channumsin, Orapin
;
Tangsrirat, Worapong
An electronically tunable voltage-mode sinusoidal quadrature oscillator circuit, which is based on using the recently introduced active building block, namely voltage differencing inverting voltage buffered amplifier (VDIBA) has been presented. The presented quadrature oscillator uses two VDIBAs, one electronic grounded resistor, and two grounded passive capacitors, suitable for MOS-C realization. The circuit performs an single-element-controlled oscillator and provides the advantage features of independent electronic control of oscillation condition and oscillation frequency. The workability of the proposed circuit has been verified using PSPICE simulations based on VDIBA implemented in TSMC 0.25-µm CMOS technology, and the simulated results demonstrate a sufficient agreement with the theoretical conclusions.
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Electronically tunable floating capacitance multiplier using FB-VDBAs
(2016-01-01)
Channumsin, Orapin
;
Tangsrirat, Worapong
This paper presents a resistorless realization of the floating capacitance multiplier circuit based on using fullbalanced voltage differencing buffered amplifiers (FB-VDBAs) as active components. The proposed floating capacitor is composed of only two FB-VDBAs and a single grounded capacitor, without requiring an additional passive resistor. The resulting equivalent capacitance value is electronically tunable through the transconductances of the FB-VDBAs. An application of the proposed tunable floating capacitor in realizing the second-order active bandpass filter is also demonstrated. PSPICE simulation results have been included to confirm the theoretical prediction.
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SIFO voltage-mode universal filter with high-input impedance
(2013-09-02)
Channumsin, Orapin
;
Tangsrirat, Worapong
In this paper, a realization of a single input five output (SIFO) voltage-mode universal biquadratic filter using differential difference current conveyor transconductance amplifier (DDCCTA) as active components is described. The presented filter is constructed using two DDCCTAs, two resistors and two capacitors, which are all grounded. The circuit simultaneously realizes all the five standard biquadratic filter functions; i.e., lowpass, bandpass, highpass, bandstop and allpass, without changing the circuit topology. It also offers the advantage feature of high-input impedance terminal and exhibits electronic controllability of its important parameters through the bias current of the DDCCTA as well as low sensitivity performance. PSPICE simulations using 0.5 μm MIETEC CMOS process are used to validate the theoretical predictions. © 2013 IEEE.
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Voltage-mode universal filter with one input and five outputs using DDCCTAs and all-grounded passive components
(2012-08-01)
Channumsin, Orapin
;
Pukkalanun, Tattaya
;
Tangsrirat, Worapong
This paper presents a versatile voltage-mode universal active filter with one input and five output terminals. The proposed circuit is based on using the recently reported active building block, namely differential difference current conveyor transconductance amplifier (DDCCTA). It employs two DDCCTAs as active elements together with two resistors and two capacitors as passive elements, which are all grounded. The circuit simultaneously realizes all the five standard biquadratic filter functions; i.e.; lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS) and allpass (AP), without changing circuit topology. The proposed circuit also has the advantage of high-input impedance terminal, and exhibits electronic tunability of its important parameters through the bias current of the DDCCTA as well as low sensitivity performance. PSPICE simulations using 0.5 μm MIETEC CMOS process are used to validate the theoretical predictions. © 2011 Elsevier Ltd. All rights reserved.
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Single CCCTA-based sinusoidal oscillator with voltage and current outputs
(2014-01-01)
Channumsin, Orapin
;
Tangsrirat, Worapong
The sinusoidal oscillator which produces both voltage and current outputs simultaneously is described in this study. The described oscillator circuit contains only one current-controlled conveyor transconductance amplifier (CCCTA) and three grounded passive components. The circuit provides advantage features, such as, use of all grounded passive components, electronic tuning of oscillation condition and frequency and low sensitivity figures. Circuit performance verification is verified by PSPICE program with attractive results.

Tangsrirat, Worapong

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