The Experts below are selected from a list of 4362 Experts worldwide ranked by ideXlab platform
Montree Siripruchyanun - One of the best experts on this subject based on the ideXlab platform.
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Square-wave and PWM signal generators based on CC-CDTRA
2016 39th International Conference on Telecommunications and Signal Processing (TSP), 2016Co-Authors: Montree Siripruchyanun, Nitchamon Poonnoy, Charat Upathamkuekool, Kangwal PayakkakulAbstract:This article presents new square wave and PWM signal generators based on CC-CDTRA (Current controlled current differencing transresistance amplifier). The oscillation frequency can be adjusted by input bias current of the CC-CDTRA. In addition, for PWM signal generator, the duty cycle of the output signal is 50% which is agree with typical applications. Furthermore, the duty cycle is linear dependent on the modulation signal. The Pspice Simulation results confirm that the proposed circuit performs power consumption of 3.61mW at ±3V power supplies. Performances of the proposed circuit are confirmed, they are in accordant to theoretical explanations.
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amplitude controllable current mode first order allpass filter including minimum component count circuits
International Conference on Telecommunications, 2015Co-Authors: Amornchia Chaichana, Montree Kumngern, Montree Siripruchyanun, Winai JaiklaAbstract:This paper presents a current-mode first order allpass filter based on current follower cascaded transconductance (CFCTA). The phase shifted angle and amplitude of output currents can be electronically and independently tuned via the bias current. The proposed circuit uses only one CFCTA and one grounded capacitor and one electronic resistor, which is definitely suitable to further develop into an integrated circuit. It can provide both non-inverting and inverting output currents. Moreover, the circuit possesses low input and high output impedance, providing easy cascading in current-mode circuit. The Pspice Simulation results based on 0.25μm TSMC CMOS parameters are included, verifying the key characteristics of the presented filter. The given results agree well with the theoretical presumptions. The power consumption is about 5.5mW.
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an electronically controllable active only current mode floating inductance simulator
International Conference on Telecommunications, 2012Co-Authors: Supawat Lawanwisut, Montree SiripruchyanunAbstract:This article reviews a circuit which is active-only floating positive inductance simulator. The floating inductance simulator comprises merely one current controlled current conveyor transconductance amplifier (CCCCTA) and an internally frequency compensated operational amplifier. The simulated inductance value can be controlled electronically by adjusting bias current of the CCCCTA. The circuit performances are depicted through Pspice Simulation, they show good agreement to theoretical anticipation. An application as a resonant circuit is included to confirm the usability of proposed circuit.
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electronically controllable first order current mode allpass filter using ccciis and its application
International Conference Mixed Design of Integrated Circuits and Systems, 2011Co-Authors: Puwamet Singthong, Montree Siripruchyanun, Winai JaiklaAbstract:This article presents a resistorless current-mode first-order allpass filter based on second generation current controlled current conveyors (CCCIIs). The features of the circuit are that: the pole frequency can be electronically controlled via the input bias current: the circuit description is very simple, consisting of 2 CCCIIs and single grounded capacitor, without any external resistors and component matching requirements. Consequently, the proposed circuit is very appropriate to further develop into an integrated circuit. Low input and high output impedances of the proposed configuration enable the circuit to be cascaded in current-mode without additional current buffers. The Pspice Simulation results are depicted. The given results agree well with the theoretical anticipation. The application example as a current-mode quadrature oscillator is included.
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Voltage-mode quadrature sinusoidal oscillator with current tunable properties
Analog Integrated Circuits and Signal Processing, 2010Co-Authors: Abhirup Lahiri, Winai Jaikla, Montree SiripruchyanunAbstract:This letter presents a realization of voltage-mode quadrature sinusoidal oscillator with independent current tunable frequency of oscillation. The circuit uses a single differential voltage current conveyor transconductance amplifier (DVCCTA) as the active building block and four all grounded passive elements. Pspice Simulation results have been included to verify the theoretical results.
Ramakrishnan Venkatraman - One of the best experts on this subject based on the ideXlab platform.
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A soft-switched full-bridge single-stage AC-to-DC converter with low-line-current harmonic distortion
IEEE Transactions on Industrial Electronics, 2005Co-Authors: Ashoka K. S. Bhat, Ramakrishnan VenkatramanAbstract:A single-phase high-frequency transformer-isolated soft-switching single-stage ac-to-dc converter with low-line-current distortion is presented. The circuit configuration is obtained by integrating two discontinuous current mode (DCM) boost converters with a DCM full-bridge buck converter. The zero-voltage switching for the top switches is achieved automatically, whereas bottom switches are aided by zero-voltage transition circuits. The output voltage is regulated by duty-cycle control at constant switching frequency. The intervals of operation and steady-state analysis are presented. A systematic design procedure is presented with a 1-kW converter design example. Pspice Simulation and experimental results obtained from a 1-kW laboratory prototype are presented for a wide variation in line and load conditions.
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a soft switched full bridge single stage ac to dc converter with low line current harmonic distortion
Power Electronics Specialists Conference, 2000Co-Authors: A K S Bhat, Ramakrishnan VenkatramanAbstract:A 1-phase high frequency transformer isolated, soft-switching, single-stage AC-to-DC converter with low line-current distortion is presented. The circuit configuration is obtained by integrating two DCM boost converters with a DCM full-bridge buck converter. The ZVS for the top switches is achieved automatically, whereas, bottom switches are aided by zero-voltage transition circuits. The output voltage is regulated by duty cycle control at constant switching frequency. The steady state analysis is presented. A 1 kW converter design example is given. Pspice Simulation and experimental results obtained from a 1 kW laboratory prototype are presented.
Winai Jaikla - One of the best experts on this subject based on the ideXlab platform.
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amplitude controllable current mode first order allpass filter including minimum component count circuits
International Conference on Telecommunications, 2015Co-Authors: Amornchia Chaichana, Montree Kumngern, Montree Siripruchyanun, Winai JaiklaAbstract:This paper presents a current-mode first order allpass filter based on current follower cascaded transconductance (CFCTA). The phase shifted angle and amplitude of output currents can be electronically and independently tuned via the bias current. The proposed circuit uses only one CFCTA and one grounded capacitor and one electronic resistor, which is definitely suitable to further develop into an integrated circuit. It can provide both non-inverting and inverting output currents. Moreover, the circuit possesses low input and high output impedance, providing easy cascading in current-mode circuit. The Pspice Simulation results based on 0.25μm TSMC CMOS parameters are included, verifying the key characteristics of the presented filter. The given results agree well with the theoretical presumptions. The power consumption is about 5.5mW.
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electronically tunable current mode quadrature oscillator derived from first order allpass filter
European Modelling Symposium, 2014Co-Authors: Amornchia Chaichana, Winai JaiklaAbstract:In this study, an electronic controllability current-mode quadrature oscillator based on first-order all pass filter employing current follower cascaded Tran conductance amplifier (CFCTA) is presented. The proposed oscillator uses two CFCTAs, two electronic resistors and two grounded capacitor, which is easier for monolithic IC implementation. The condition of oscillation (CO) and frequency of oscillation are electronically and independently controlled which is well suited to use in modern electronic devices controlled by microprocessor. Moreover, the oscillator possesses high output impedances and thus it enables simple current-mode cascading. The Pspice Simulation results are included, verifying the workability of the proposed current-mode oscillator. The given results agree well with the theoretical anticipation.
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a voltage mode first order allpass filter based on vdta
Advances in Electrical and Electronic Engineering, 2014Co-Authors: Suwat Maneewan, Nawee Udorn, Danupat Duangmalai, Phamorn Silapan, Winai JaiklaAbstract:This article presents a new voltage-mode first order allpass filter (APF) employing voltage differencing transconductance amplifier (VDTA). The advantages of the circuit are that: the circuit description is very compact, consists of merely a VDTA and a capacitor: the phase shift can be electronically adjusted by current bias: it provides the lower THD of the output signal. Without any component matching conditions, the proposed circuit is very appropriate to further develop into an integrated circuit. Moreover, the proposed APF can provide the output current with high output impedance without modification of the circuit topology. The Pspice Simulation results are depicted. The given results agree well with the theoretical anticipation. The maximum power consumption is 400µW at ±1.25V power supplies.
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realization of electronically tunable currentmode first order allpass filter and its application
World Academy of Science Engineering and Technology International Journal of Electrical Computer Energetic Electronic and Communication Engineering, 2012Co-Authors: Supayotin Na Songkla, Winai JaiklaAbstract:This article presents a resistorless currentmode first� order allpass filter based on second generation current controlled current conveyors (CCCIIs). The features of the circuit are that: the pole frequency can be electronically controlled via the input bias current: the circuit description is very simple, consisting of 2 CCCIIs and single grounded capacitor, without any external resistors and component matching requirements. Consequently, the proposed circuit is very appropriate to further develop into an integrated circuit. Low input and high output impedances of the proposed configuration enable the circuit to be cascaded in currentmode without additional current buffers. The Pspice Simulation results are depicted. The given results agree well with the theoretical anticipation. The application example as a currentmode quadrature oscillator is included.
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electronically controllable first order current mode allpass filter using ccciis and its application
International Conference Mixed Design of Integrated Circuits and Systems, 2011Co-Authors: Puwamet Singthong, Montree Siripruchyanun, Winai JaiklaAbstract:This article presents a resistorless current-mode first-order allpass filter based on second generation current controlled current conveyors (CCCIIs). The features of the circuit are that: the pole frequency can be electronically controlled via the input bias current: the circuit description is very simple, consisting of 2 CCCIIs and single grounded capacitor, without any external resistors and component matching requirements. Consequently, the proposed circuit is very appropriate to further develop into an integrated circuit. Low input and high output impedances of the proposed configuration enable the circuit to be cascaded in current-mode without additional current buffers. The Pspice Simulation results are depicted. The given results agree well with the theoretical anticipation. The application example as a current-mode quadrature oscillator is included.
Ashoka K. S. Bhat - One of the best experts on this subject based on the ideXlab platform.
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A soft-switched full-bridge single-stage AC-to-DC converter with low-line-current harmonic distortion
IEEE Transactions on Industrial Electronics, 2005Co-Authors: Ashoka K. S. Bhat, Ramakrishnan VenkatramanAbstract:A single-phase high-frequency transformer-isolated soft-switching single-stage ac-to-dc converter with low-line-current distortion is presented. The circuit configuration is obtained by integrating two discontinuous current mode (DCM) boost converters with a DCM full-bridge buck converter. The zero-voltage switching for the top switches is achieved automatically, whereas bottom switches are aided by zero-voltage transition circuits. The output voltage is regulated by duty-cycle control at constant switching frequency. The intervals of operation and steady-state analysis are presented. A systematic design procedure is presented with a 1-kW converter design example. Pspice Simulation and experimental results obtained from a 1-kW laboratory prototype are presented for a wide variation in line and load conditions.
Montree Kumngern - One of the best experts on this subject based on the ideXlab platform.
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amplitude controllable current mode first order allpass filter including minimum component count circuits
International Conference on Telecommunications, 2015Co-Authors: Amornchia Chaichana, Montree Kumngern, Montree Siripruchyanun, Winai JaiklaAbstract:This paper presents a current-mode first order allpass filter based on current follower cascaded transconductance (CFCTA). The phase shifted angle and amplitude of output currents can be electronically and independently tuned via the bias current. The proposed circuit uses only one CFCTA and one grounded capacitor and one electronic resistor, which is definitely suitable to further develop into an integrated circuit. It can provide both non-inverting and inverting output currents. Moreover, the circuit possesses low input and high output impedance, providing easy cascading in current-mode circuit. The Pspice Simulation results based on 0.25μm TSMC CMOS parameters are included, verifying the key characteristics of the presented filter. The given results agree well with the theoretical presumptions. The power consumption is about 5.5mW.
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fdccta the active building block for analog signal processing applications
IEEE International Conference on Semiconductor Electronics, 2014Co-Authors: Montree KumngernAbstract:This study presents a new active building block for analog signal processing applications, namely fully differential current conveyor transconductance amplifier. The proposed circuit is realized using differential difference current conveyors and transconductance amplifiers. Unlike, previous building blocks, both fully differential input and electronic tuning capability can be obtained into a single new device. The proposed building block is used to realize a universal biquadratic filter as an example application. Pspice Simulation results using 0.5 μm CMOS technology from MIETEC are used to confirm the presented building block. The Simulation results express that the proposed active building block can be used to realize analog signal processing circuits.
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new versatile precision rectifier
Iet Circuits Devices & Systems, 2014Co-Authors: Montree KumngernAbstract:This study presents a versatile precision rectifier. The circuit yields a positive half-wave signal, a negative half-wave signal, a positive full-wave signal and a negative full-wave signal into one single structure. The personal computer Simulation program with integrated circuit emphasis (Pspice) Simulation is performed to examine the performance of the new circuit. The experimental result is also confirmed workability of the proposed circuit.
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a cmos current mode multiplier divider using a current amplifier
IEEE International Power Engineering and Optimization Conference, 2013Co-Authors: Montree Kumngern, Usa TorteanchaiAbstract:This paper presents a new realization of current-mode two-quadrant analogue multiplier/divider using only a single current amplifier. CMOS technology is used to realize the proposed circuit. Therefore, it can be implemented by low cost technology. The proposed circuit provides following advantages: low circuit complexity, very suitable for integrated circuit implementation, good temperature stability. Pspice Simulation results using the 0.5 μm CMOS technology from MIETEC are included to confirm the workability of the presented theory.
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voltage mode universal filter with one input and five outputs using five otas two grounded capacitors and one resistor
2012 IEEE International Conference on Electronics Design Systems and Applications (ICEDSA), 2012Co-Authors: Montree KumngernAbstract:This paper presents a new electronically tunable voltage-mode universal biquadratic filter with one input and five outputs employing five operational transconductance amplifiers, two grounded capacitors and one resistor. The filter can offer voltage-mode low-pass, band-pass, high-pass, band-stop and all-pass filter responses from the same circuit. The properties of the circuit such as no inverting-type input signal requirements, high-input impedance, orthogonal- and electronic-control of the natural frequency and the quality factor, are also possessed. Moreover, the active and passive sensitivities of the filter are low. Pspice Simulation results are provided to demonstrate the theoretical analysis.
