Kumngern, Montree
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Kumngern, Montree
Alternative Name
KUMNGERN, Montree
Kumngern, M.
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Email
montree.ku@kmitl.ac.th
43 results
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Item type:Publication, Electronically tunable versatile voltage-mode biquadratic filter with three-input six-output using OTAs and grounded capacitors(2012-07-16)This paper presents a new electronically tunable versatile voltage-mode biquadratic filter with three inputs and six outputs using operational transconductance amplifiers and grounded capacitors. The proposed circuit provides simultaneously realize voltage-mode low-pass, band-pass, high-pass, band-stop and allpass filter responses. The natural frequency and the quality factor can be set orthogonally. Also the natural frequency can be electronically controlled. No component-matching conditions and no inverting-type input signals are required for realizing all the filter responses. The active and passive sensitivities are low. PSPICE simulation results are given to confirm the presented theory. © 2012 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Voltage-mode first-order allpass filter using single-ended OTAs and grounded capacitor(2012-07-16); Chanwutitum, JirasakThis paper presents a new electronically tunable voltage-mode first-order allpass filter using only three single-ended operational transconductance amplifiers (OTAs) and one grounded capacitor, which is highly suitable for integrated circuit implementation. The pole frequency of the filter can be tuned electronically by adjusting the transconductance value of the OTA. No component-matching conditions are also required for realizing allpass response. The characteristics of the proposed circuit are simulated using PSPICE simulations to confirm the theory. © 2012 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A floating memristor emulator circuit using operational transconductance amplifiers(2015-09-30)This paper presents a floating memristor emulator circuit using operational transconductance amplifiers (OTAs). The OTAs are used to realize electronically tunable second-generation current conveyors (ECCIIs). The behavior of a titanium dioxide (T<inf>i</inf>O<inf>2</inf>) memristor model of Hewlett-Packard laboratories has been imitated in the form of emulator circuit using ECCIIs. The hardware of proposed memristor emulator can be built using low cost devices that found in the market. The memristor emulator can be used as both the simulations and experiments which is valuable in a teaching aid and a real circuit application. Simulation and experimental results are also given to confirm the workability of the proposed circuit. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, 0.5-V High Linear Fully Differential Multiple-Input Bulk-Driven OTA With Effective Self-Embedded CMFB(2024-01-01); This paper presents a new fully differential multiple-input operational transconductance amplifier (FD MI-OTA) with an effective self-embedded common-mode feedback circuit (CMFB). The circuit employs several design techniques to extend the linearity to the rail-to-rail level, such as a bulk-driven, multiple-input capacitive voltage divider and source degeneration. The circuit uses self-cascode transistors to increase the gain of the OTA from one side and to create a common-mode feedback circuit, needed to control the common-mode output voltage from the other side. Thus, the CMFB is part of the OTA and as a result, its chip area and power consumption remain unchanged. The performance of the proposed circuit was simulated using TSMC s CMOS 0.18 μ m process in the Cadence Virtuoso System Design Platform to validate the performance of the topology. Intensive simulation results based on Monte Carlo and process, voltage, temperature corners were performed to confirm the OTA's performance and the robustness of the CMFB. The circuit operates with a supply voltage of 0.5 V and consumes 17.5nW of power, making it suitable for applications with extremely low voltage supply and low frequency. As an application, a second-order low-pass filter was designed based on the proposed FD MI-OTA. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A memristor emulator circuit based on operational transconductance amplifiers(2015-08-17); This paper introduces a memristor emulator circuit based on operational transconductance amplifiers. This emulator circuit is imitated the behavior of a titanium dioxide memristor model using commercial available integrated circuit. Thus, the hardware of proposed emulator circuit can be built using devices that find in the market. Also the circuit can be tested in both simulations and experiments which can be used as a teaching aid and for real circuit applications. Simulation and experimental results are given as agree well with theory. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Realization of electronically tunable first-order allpass filter using single-ended OTAs(2012-12-01)A new of voltage-mode first-order allpass filter using only three single-ended operational transconductance amplifiers (OTAs) and one capacitor is proposed. The pole frequency can be controlled electronically by adjusting the transconductance value of the OTA. Moreover, for realizing first-order allpass reposed no any conditions of component-matching are required. The characteristics of the proposed filter circuit are also simulated using PSPICE simulations to verify the theory. © 2012 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, 0.5-V 281-nW Versatile Mixed-Mode Filter Using Multiple-Input/Output Differential Difference Transconductance Amplifiers(2024-01-01); Kulej, TomaszThis paper presents a new low-voltage versatile mixed-mode filter which uses a multiple-input/output differential difference transconductance amplifier (MIMO-DDTA). The multiple-input of the DDTA is realized using a multiple-input bulk-driven MOS transistor (MI-BD-MOST) technique to maintain a single differential pair, thereby achieving simple structure with minimal power consumption. In a single topology, the proposed filter can provide five standard filtering functions (low-pass, high-pass, band-pass, band-stop, and all-pass) in four modes: voltage (VM), current (CM), transadmittance (TAM), and transimpedance (TIM). This provides the full capability of a mixed-mode filter (i.e., twenty filter functions). Moreover, the VM filter offers high-input and low-output impedances and the CM filter offers high-output impedance; therefore, no buffer circuit is needed. The natural frequency of all filtering functions can be electronically controlled by a setting current. The voltage supply is 0.5 V and for a 4 nA setting current, the power consumption of the filter was 281 nW. The filter is suitable for low-frequency biomedical and sensor applications that require extremely low supply voltages and nano-watt power consumption. For the VM low-pass filter, the dynamic range was 58.23 dB @ 1% total harmonic distortion. The proposed filter was designed and simulated in the Cadence Virtuoso System Design Platform using the 0.18 µm TSMC CMOS technology. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electronically tunable voltage-mode universal filter with single-input five-output using simple OTAs(2013-08-01); ; Dejhan, KobchaiThis article presents a new electronically tunable voltage-mode universal biquadratic filter with single-input five-output using simple operational transconductance amplifiers (OTAs) and grounded capacitors. The proposed configuration provides low-pass, band-pass, high-pass, band-stop and all-pass voltage responses at a high-impedance input terminal that enables easy cascading in voltage-mode. The natural frequency and the quality factor can be set orthogonally by adjusting the circuit components. The natural frequency can also be controlled electronically by adjusting the bias currents of the OTAs. For realising all the five standard filtering functions, no critical-matching conditions are imposed and all the incremental parameter sensitivities are low. Experimental and simulation results that confirm the theoretical predictions are given. © 2013 Copyright Taylor and Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, CMOS tunable positive/negative floating resistor using OTAs(2012-10-17)In an integrated circuit, a resistor can be achieved in silicon technology by using poly silicon of diffusion areas but a resistor of practical value based on this technique suffers the limitation of resistance value and also its resistance value can not variable. Moreover, only a positive resistor can be achieved from silicon technology. This paper presents a new tunable floating resistor using operational transconductance amplifiers (OTAs). Unlike the previously reported circuits, this circuit can realize a positive floating resistor and a negative floating resistor without changing the circuit topology which is highly suitable for implementation in CMOS technology. The simulated resistance value and either a positive or a negative resistor can be selected electronically by adjusting the biasing currents of OTAs. The workability of the proposed circuit is confirmed by PSPICE simulators. From simulation results, it can be expressed that the proposed circuit agrees well with theory. © 2012 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Five-Input One-Output Universal Filter Using Simple CMOS OTAs(2018-07-02)