Pukkalanun, Tattaya
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Pukkalanun, Tattaya
Alternative Name
Pukkalanun, T.
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Email
tattaya.pu@kmitl.ac.th
12 results
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Item type:Publication, Electronically tunable phase shifter using CDTAs(2009-12-01); The realization of an electronically tunable phase shifter using current differencing transconductance amplifiers (CDTAs) as active components is presented. The proposed filter employs only two CDTAs and one virtually grounded capacitor, which its phase shift can be electronically adjusted by varying the bias current of the CDTA. The circuit also exhibits high-output impedance, which is easy cascading in the current-mode operation. As application example, the current-mode biquad filter based on the proposed CDTA-based phase shifter circuit is also presented. PSPICE simulation results of the proposed circuit and its application are given to confirm the theoretical analysis. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, CDTA-based current limiters and applications(2008-12-01); In this paper, a synthesis of analog current limiter (CL) building blocks based on a current differencing transconductance amplifier (CDTA) is proposed. The breakpoint and the slope of the resulting transfer characteristic obtained from the proposed CDTA-based CLs are electronically programmable through the external bias currents. To demonstrate versatility of the proposed electronically tunable CLs, some nonlinear applications to programmable current- mode precision full-wave rectifier and piecewise-linear function approximation generators are also presented. SPICE simulations confirm the effectiveness of the proposed circuits. © 2008 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Current-mode multiphase sinusoidal oscillator using CDTA-based allpass sections(2009-07-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Low passive component-count current follower-based current-mode second-order notch filter(2005-01-01); ; Surakampontorn, W.A realization of a current-mode second-order notch filter using current followers (CFs) and a minimum number of passive elements is proposed. The proposed filter has a high output impedance, consequently it can be cascaded without using additional buffers. The filter displays low incremental passive sensitivities. Moreover, if the passive element values are properly chosen, the circuit permits also the realization of allpass response. The SPICE simulation results are given to verify the theoretical predicted behaviors. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, CCCII-based high-output impedance current-mode universal filter employing only grounded capacitors(2006-12-01); A current-controlled current-mode universal filter with three inputs and one output using only three current-controlled current conyevors (CCCIIs) and two grounded capacitors is described. The proposed filter provides lowpass, bandpass, highpass, bandstop and allpass current outputs at a high impedance terminal, which enable easy cascadability. The filter also offers an independent electronic control of the natural frequency ω<inf>0</inf> and the parameter ω<inf>0</inf>Q through adjusting the bias current of the CCCII. No critical matching condition is required for realizing all the filter responses, and all the incremental parameter sensitivities are low. The performances of the proposed circuit are simulated with PSPICE to confirm the presented theory. © 2006 ICASE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Digitally programmable current follower and its applications(2009-05-01); In this paper, a CMOS implementation of the digitally programmable current follower (DP-CF) is presented. To achieve very low-input resistance, it is realized using a modification of a low-input resistance stage as an input stage. To achieve the precise digital control of the current gain, the current division technique is used. The proposed DP-CF is operated under ± 1.5 V voltage supplies, and designed with 0.5-μ m CMOS SCN05H process. Applications of the proposed DP-CF in realizing digitally programmable current-mode filter and rectifier are given. SPICE simulation results of the proposed circuit and its applications are also included. © 2008 Elsevier GmbH. All rights reserved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Current tunable current-mode biquadratic filter using dual-output current followers(2009-12-01); This paper describes a current-mode multifunction filter with a minimum number of active and passive elements using dual-output current followers (DO-CFs) as active elements. By based on the dual-output current-controlled current conveyor (DO-CCCII)-based current followers, the proposed filter consists of only two DO-CFs and two grounded capacitor, without an external passive resistor requirement. The filter can realize all the standard biquadratic functions without changing the circuit configuration. Moreover, its natural angular frequency and bandwidth is controllable independently and electronically by adjusting an external bias current, and its active and passive sensitivities are low. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Current-controlled current-mode biquadratic filter with two inputs and three outputs using multiple-output FTFNs(2006-12-01); A current-controlled current-mode biquadratic filter using a modified type of a four-terminal floating nullor (FTFN), which is called as an electronically tunable multiple-output FTFN (ET-FTFN), is proposed. The proposed filter with two-input and three-output terminals comprises only ET-FTFNs and four grounded passive elements. The filter can simultaneously realize the inverting-type lowpass, noninverting-type lowpass, inverting-type banpass, noninverting-type bandpass, highpass, bandstop and allpass filter functions. The natural angular frequency and the quality factor are independently controlled by adjusting the external bias currents of the ET-FTFNs. All the active and passive sensitivities are low. PSPICE simulation results are employed to verify the circuit performance. © 2006 ICASE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Current differencing buffered amplifier based multiple-output biquadratic filters(2005-01-01); ; Surakampontorn, W.In this paper, multiple-output multifunctional biquadratic filters using current differencing buffered amplifiers (CDBAs) as active elements are presented. The proposed circuit topologies are mainly composed of the CDBA-based cross-coupled feedback configuration and the voltage substractor. By an appropriate choice of virtually grounded passive components, the configurations can simultaneously realize lowpass, highpass, bandpass, bandstop and allpass voltage transfer functions, all at low resistance outputs. The natural angular frequency and the quality factor can orthogonal controllable. PSPICE simulation results demonstrating the feasibility of the technique are also included. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, CFOA-based single resistance controlled quadrature oscillator(2008-12-01);