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1.2 V differential difference current conveyor using MIGD MOST technique and its applications
(2023-01-01)
Kumngern, Montree
;
Khateb, Fabian
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Phatsornsiri, Punnavich
;
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
;
Torteanchai, Usa
;
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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Quadrature oscillator/universal filter using CCCII with adjustable gain
(2018-07-02)
Wareechol, Eakluck
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Kumngern, Montree
;
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
;
Phatsornsiri, Punnavich
;
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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A current-mode four-phase third-order quadrature oscillator using a MCCCFTA
(2012-01-01)
Kumngern, Montree
;
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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