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1.2 V differential difference current conveyor using MIGD MOST technique and its applications
(2023-01-01)
Kumngern, Montree
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Khateb, Fabian
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Phatsornsiri, Punnavich
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Jongchanachavawat, Wirote
;
Kulej, Tomasz
This paper presents a new differential difference current conveyor (DDCC), realized using multiple-input gate-driven MOS transistor (MIGD MOST) technique. The application of MIGD MOST can reduce the number of differential pairs in the input stage of the DDCC, thus simplifying its overall structure. Unlike previous DDCC, the output stage of the circuit operates in super class-AB, that offers low static power consumption, high load driving capability and improved gain-bandwidth product (GBW).The proposed DDCC can work with the supply voltage of 1.2 V and consumes 44.2 μW of power. The proposed DDCC has been used to realize a versatile circuit that can work as a universal filter or a quadrature oscillator into a single topology. When the circuit works as a universal filter, it can realize low-pass, band-pass, high-pass, band-stop and all-pass voltage responses. The natural frequency and the quality factor of these responses can be orthogonally controlled. When the circuit works as a quadrature oscillator, the condition and the frequency of oscillators can be orthogonally controlled. The proposed MIGD DDCC and the proposed universal filter and quadrature oscillator have been simulated with SPICE, using 0.18 μm CMOS process parameters to prove the functionality and workability of the new circuits.
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Programmable Universal Filter and Quadrature Oscillator Using Single Output Operational Transconductance Amplifiers
(2021-01-01)
Knobnob, Boonying
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Torteanchai, Usa
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Kumngern, Montree
This paper presents a new programmable universal filter and quadrature oscillator based on the single output operational transconductance amplifiers (OTAs). The proposed universal filter and quadrature oscillator can be achieved into single topology by programming analog switches. When the circuit performs as a universal filter, it can realize low-pass, high-pass, band-pass, band-stop and all-pass filters with orthogonal and electronic controls of the natural frequency and quality factor. When the circuit performs as a quadrature oscillator, it provides a three-phase quadrature output signal which the condition and frequency of oscillations can be controlled orthogonally and electronically. The proposed structure can be realized based on the single output OTAs which are easily implemented as both commercially available integrated circuits (ICs) as OTAs and complementary metal-oxide semiconductor (CMOS) OTAs as IC forms. SPICE simulation using standard 0.18 µm CMOS process is used for investigating the performance of the proposed circuit whereas the workability of new circuit is confirmed by LM13600 discrete-component integrated circuits as OTAs.
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Current-mode universal filter and quadrature oscillator using current controlled current follower transconductance amplifiers
(2019-08-15)
Kumngern, Montree
;
Khateb, Fabian
This paper presents a new current-mode quadrature oscillator and universal filter that employs two current controlled current follower transconductance amplifiers and two grounded capacitors. The proposed circuit can be realized either as a quadrature oscillator or as a universal filter without changing circuit topology. In case the circuit works as a quadrature oscillator, the condition and the frequency of oscillation can be independently and electronically controlled. Four-phase quadrature current outputs and two-phase quadrature voltage outputs can also be obtained. In case the circuit works as a universal filter, low-pass, high-pass, band-pass, band-stop and all-pass filtering functions can be obtained simultaneously by appropriately selecting the input and output signals. The natural frequency and the quality factor of filter can also be obtained independently and electronically. PSPICE simulation results are used to verify the workability of the new topology.
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Quadrature oscillator and universal filter based on translinear current conveyors
(2018-09-01)
Kumngern, Montree
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Wareechol, Eakluck
;
Phasukkit, Pattarapong
This paper presents quadrature oscillator and universal filter based on translinear current conveyors. The proposed circuit can realize as a quadrature oscillator or a universal filter without changing the circuit topology. When it works as a quadrature oscillator, four quadrature current outputs and two quadrature voltage outputs can be obtained. The condition and frequency of oscillation of oscillator can be controlled orthogonally and electronically. When it works as a universal filter, low-pass, band-pass, high-stop, band-stop, and all-pass filtering functions can be obtained simultaneously. The natural frequency and quality factor of filters can be controlled orthogonally and electronically. The proposed topology is simulated using PSPICE simulators and experimental results are also used to confirm workability of new circuit.
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Quadrature oscillator/universal filter using CCCII with adjustable gain
(2018-07-02)
Wareechol, Eakluck
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Kumngern, Montree
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Torteanchai, Usa
This paper presents a quadrature oscillator and universal filter using current controlled current conveyor with adjustable gain as active element. The proposed circuit combines a quadrature oscillator and a universal filter without changing the topology. In the case that the circuit works as a quadrature oscillator, two quadrature voltage outputs and four quadrature current outputs can be obtained. The condition of oscillation and frequency of oscillation can be orthogonally controlled. In the case that the circuit works as a universal filter, low-pass, band-pass, high-stop, band-stop, and all-pass filtering functions can be obtained. The natural frequency and quality factor of filters can be electronically controlled. The proposed topology is simulated using PSPICE simulators to confirm the workability of the new circuit.
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Quadrature Oscillator Using Operational Transresistance Amplifiers
(2016-07-02)
Torteanchai, Usa
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Phatsornsiri, Punnavich
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Kumngern, Montree
This paper presents a new quadrature oscillator using operational transresistance amplifiers (OTRAs). The use of OTRA as active elements which offers low parasitic parameters, high slew rate and high bandwidth independent of the gain, precision of oscillating frequency can be achieved. The oscillating frequency and oscillating condition of proposed oscillator can be independently controlled. Also output terminals are possessed low impedance level which can be directly connected to the load without any buffer circuits. Simulation results verifying the theoretical analysis are included to confirm proposed structure. From simulation results, it can be expressed that the simulation result is very agree well with theory.
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Current-mode quadrature oscillator using current differencing transconductance amplifiers
(2012-07-01)
Kumngern, Montree
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Lamun, Panit
;
Dejhan, Kobchai
This article presents a new electronically tunable single-element-controlled current-mode quadrature sinusoidal oscillator circuit using current differencing transconductance amplifiers (CDTAs). The proposed oscillator is consisted of two CDTAs, two grounded capacitors and one grounded resistor, which is beneficial to monolithic integrated circuit implementation both in CMOS and bipolar technologies. The condition of oscillation and the frequency of oscillation are independently controllable. The frequency of oscillation can also be electronically controlled by adjusting the bias current of CDTA. The circuit provides four quadrature current outputs and two quadrature voltage outputs. The current output terminals possess high impedance level. PSPICE simulation results are used to verify the performance of the proposed circuit implemented at the transistor level. The measurement results support the computer simulations.
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A current-mode four-phase third-order quadrature oscillator using a MCCCFTA
(2012-01-01)
Kumngern, Montree
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Torteanchai, Usa
This paper presents a new current-controlled current-mode third-order quadrature oscillator. The proposed circuit employs only one modified current-controlled current follower transconductance amplifier (MCCCFTA) and three grounded capacitors which is highly suitable for integrated circuit implementation. Also four quadrature current output terminals possess high impedance level which can be directly connected to the next stage without additional follower circuits. The condition of oscillation and the frequency of oscillation can be controlled orthogonally and electronically by adjusting the biasing currents of the MCCCCFTA. Simulation results verifying the theoretical analysis are included. © 2012 IEEE.
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Current-mode quadrature sinusoidal oscillator with current and voltage outputs
(2010-08-11)
Kumngern, Montree
A new current-mode quadrature oscillator, which provides both current and voltage outputs simultaneously is proposed. The proposed circuit employs two differential voltage current conveyors, two grounded capacitors and three grounded resistors. The condition oscillator and the frequency oscillation are orthogonally controllable. The proposed circuit can be made electronic control by using voltage-controlled differential voltage current conveyors. Simulation results verifying the theoretical analysis are also included. ©2010 IEEE.
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Electronically tunable current-mode quadrature oscillator using current differencing transconductance amplifiers
(2009-12-01)
Kumngern, Montree
;
Dejhan, Kobchai
A new electronically tunable single-element-controlled current-mode quadrature oscillator circuit using current differencing transconductance amplifiers (CDTAs) is presented. The proposed oscillator is consisted of two CDTAs, two grounded capacitors and one grounded resistor, which is beneficial to monolithic integrated circuit implementation. The oscillation condition and oscillation frequency of the circuit are independently controllable. Also, the oscillation frequency can be controlled by a bias current of CDTA. The realized of the circuit provides four quadrature current outputs at high output impedance nodes. PSPICE simulation results that confirm the theoretical predictions are given. © 2009 IEEE.

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