Kumngern, Montree
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Preferred name
Kumngern, Montree
Alternative Name
KUMNGERN, Montree
Kumngern, M.
Main Affiliation
Email
montree.ku@kmitl.ac.th
28 results
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Item type:Publication, Electronically tunable current-mode all-pass filter-based high-Q bandpass filter using minimum elements(2009-12-01)A new electronically tunable current-mode high-Q bandpass filter employing second-generation current controlled conveyor (CCCII)-based first-order all-pass filters is presented. The proposed filter uses only three CCCIIs, one current-controlled resistor and two grounded capacitors. The center frequency (ω<inf>c</inf>) and the quality factor (Q) can be independently adjusted through the bias current of the CCCII and current-controlled resistor. The Q-value is also temperature independent. The proposed configuration is very attractive for monolithic form. The performances of the proposed circuit are simulated with PSPICE to confirm the presented theory. ©2009 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electronically tunable current-mode quadrature oscillator using current differencing transconductance amplifiers(2009-12-01); Dejhan, KobchaiA 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A versatile vector summation circuit(2006-12-01); ; Dejhan, KobchaiA versatile vector summation circuit is presented. It is based on CMOS dual translinear loops as operate in class AB and current mirrors, which leads to the input signal can be voltage and/or current into a single circuit without changing the circuit configuration. The circuit exhibits wide input range, low power consumption and good temperature stability. Simulation and experimental results verifying theoretical analyses are given. © 2006 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Wide-band CMOS precision rectifier circuit(2008-12-01); ; Dejhan, KobchaiA wide-band precision CMOS rectifier, which is very suitable for integrated circuit implementation, is presented. The proposed circuit consists of a voltage-to-current converter, two precision rectifiers and four current-to-voltage converters that performs positive half-wave, negative half-wave, positive full-wave and a negative full-wave rectifications into a single circuit. The precision current-mode rectifier with operating in class-AB is employed to provide the high-frequency capability of the circuit. The circuit exhibits a very versatility, high operating frequency and good temperature stability The proposed configuration is very suitable for integrated circuit implementation both CMOS and bipolar technologies. The simulation results in CMOS technology demonstrate the performance of the proposed circuit. © 2008 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electronically tunable voltage-Mode all-pass filter using simple CMOS OTAs(2008-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, New current-controlled current-mode multifunction filter using translinear current conveyors(2008-12-01); ; Dejhan, KobchaiA new current-mode universal biquadratic filter with two inputs and two outputs employing only two translinear current conveyors with controlled gain and two grounded capacitors is proposed. The proposed circuit offers the following features: realization of lowpass, bandpass, highpass, bandstop and allpass current responses from the same configuration, no requirements for component-matching conditions, independent current control of the natural frequency and the quality factor, low active and passive sensitivities, minimum active and passive components, high impedance output. The characteristics of the proposed circuit are simulated using PSPICE to confirm the theory. © 2008 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, DDCC-based full-wave rectifier(2009-10-19); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A wide-band half-wave rectifier(2009-12-01)A wide-band precision CMOS half-wave rectifier circuit with positive and negative outputs is presented, in this paper. The proposed circuit consists of a voltage-to-current converter, a precision current-mode rectifier with operating in class AB, and two current-to-voltage converters. A voltage input signal is changed into a current signal by the voltage-to-current converter. The class AB current-mode rectifiers rectify these current signals, resulting in positive and negative half-wave current signals that are converted to positive and negative half-wave voltage signals by the current-to-voltage converters. The circuit exhibits low component counts, high frequency operation, good temperature stability and suitable of IC fabrication. The simulation results are used to verify the performance of the proposed circuit. Simulated rectifier performance with standard 0.5μm CMOS technology using ±1.2V supply voltage shows the proposed half-wave rectifier circuit provides an operating frequency more than 250MHz and excellent temperature stability. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A low-voltage CMOS current squarer circuit(2005-12-01); ; Dejhan, KobchaiThis paper presents a low-voltage current-mode CMOS squarer circuit. The low voltage operation can be achieved by the simple circuit design of the simple CMOS current mirrors and voltage shifting circuit. The realization method uses the MOS square-law technique in saturation region and require only V <inf>Th</inf>+2V<inf>DS</inf>. Simulation results show that the proposed circuit works well at supply voltage of 1V for a 0.5μm technology. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, High-input and low-output impedance voltage-mode all-pass networks(2009-12-01); Dejhan, KobchaiIn this paper, two new voltage-mode first-order all-pass networks are proposed. Each of proposed networks employs two differential difference current conveyors (DDCCs), one grounded capacitor and one grounded capacitor. No passive component matching conditions are required. The networks offer high-input and low-output impedances; hence it can be directly employed as a subsystem of monolithic circuits. The use of only grounded capacitor and resistor makes the proposed networks ideal for integrated circuit implementation. The characteristics of the proposed all-pass networks are simulated using PSPICE to verify the theory.