Supavarasuwat, Piya
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Supavarasuwat, Piya
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piya.su@kmitl.ac.th
7 results
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Item type:Publication, A voltage-mode three-input one-output multifunction filter using single FDCCII(2015-04-22); This paper presents a new three-input one-output voltage-mode multifunction filter using one fully differential current conveyor as an active element, and two capacitors, three resistors as passive components. The use of only one single active device is the main advantage of this paper. The proposed circuit provides high-pass, band-pass, low-pass, band-stop and all-pass voltage responses into a single topology. The natural frequency and the quality factor of the filter can be controlled by setting the value of passive components. The filter is absent from the inverting-type input signal requirement for realizing all filtering functions and also low passive sensitivity. The characteristics of the proposed filter are verified by PSPICE simulators. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Single-input multiple-output voltage-mode shadow filter based on VDDDAs(2019-05-01); ; ; This paper presents a voltage-mode shadow filter with single-input multiple-output (SIMO) configuration using voltage differencing differential difference amplifiers (VDDDAs). In this design, the low-pass and high-pass output functions of the single-input three-output second order filter are feedback via the voltage amplifier. The proposed filter consists of three VDDDAs, one grounded resistor and two grounded passive elements. The proposed filter uses grounded elements which is attractive for integrated circuit (IC) fabrication. It can simultaneously provide low-pass (LP), high-pass (HP), band-pass (BP), band-reject (BR) and all-pass (AP) responses without matching condition. The proposed circuit has high input impedance. The natural frequency (ω <inf>0</inf> ) and quality factor (Q) can be independently and electronically tuned by changing the external DC bias currents. The effect of the non-ideal and parasitic elements of the VDDDA is studied and investigated. The PSpice simulation and experimental results using CMOS technology and commercially available active devices are given to confirm the workability of the proposed filter. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Cascadable independently and electronically tunable voltage-mode universal filter with grounded passive components(2018-02-01); ; ; Khateb, FabianIn this paper, the voltage-mode universal filter employing the active building block, called voltage differencing differential difference amplifier (VDDDA) is introduced. The proposed circuit configuration has single output voltage node and five input voltage nodes. All input voltage nodes exhibit high impedance with low output impedance of the output voltage node, which is completely cascaded without the use of any external voltage buffer. The proposed filter realizes bandpass (BP), lowpass (LP), highpass (HP), allpass (AP) and bandstop (BS) filtering functions with using the same circuit topology. The output filtering response function can be obtained by appropriately applying input voltage without any matching condition. The control of the natural frequency and the quality factor can be done electronically and independently. The proposed circuit comprises three VDDDAs, two grounded capacitors and single grounded resistor. The workability of the proposed filter is investigated via PSpice simulation program and experimental results. The results agree well with theoretical anticipations. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of low input and high output impedance current-mode biquad filter using CDTAs with independent control of quality factor and pole frequency(2013-12-31); ; Jaikhang, WipobhIn this study, a single-input multiple-outputs current-mode analog biquadratic filter, based on current differencing transconducatance amplifier (CDTA) is presented. The proposed filter uses two CDTAs, one resistor and two grounded capacitors, which is well suited for integrated circuit implementation. The circuit simultaneously gives 3 standard transfer functions, namely, lowpass, highpass and bandpass filters with independent control of quality factor and pole frequency by electronic method. By summing of I<inf>HP</inf> and I<inf>LP</inf>, the notch filter can be also achieved. Moreover, the circuit possesses low input and high output impedance which would be an ideal choice for current-mode cascading. The PSPICE simulation results are included verifying the workability of the proposed filter. The given results agree well with the theoretical anticipation. © 2013 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, TITO-type current-mode universal filter with one active element(2015-09-30); This paper presents a new current-mode universal filter with two-input two-output using only one fully differential current conveyor, two grounded capacitors and two grounded resistors. The use of grounded passive components makes the proposed structure highly for integrated circuit implementation. The proposed filter provides low-pass, band-pass, high-pass, band-stop and all-pass current responses into a single topology with no passive-value matching condition requirements. The natural frequency and the quality factor can be controlled orthogonally by setting the value of the passive components. The workability of the proposed circuit is confirmed using PSPICE simulators. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electronically controlled voltage mode first order multifunction filter using low-voltage low-power bulk-driven OTAs(2019-09-01); ; ; In this paper, a new versatile voltage mode first order filter using low-voltage low-power bulk-driven OTAs is presented. The proposed filter with two high impedance input-voltage nodes and single output-voltage node consists of two OTAs, one grounded capacitor and one grounded resistor. Three filtering responses, low-pass (LP), high-pass (HP) and all-pass (AP) are obtained by appropriately applying the input signal into the input nodes. The natural frequency (ω<inf>0</inf>) can be electronically tuned by the bias current. In case of all-pass filter, its phase response is electronically controlled by adjusting only single bias current. With this feature, it doesn't need to simultaneously change two bias currents or two passive element values. The performances of the proposed filter were evaluated via PSPICE simulations using CMOS 0.18 μm TSMC technology parameters (level 7) with ±0.4 V supply voltages. The proposed filter consumes 47.2 μW. To obtain the actual testing results, the proposed filter was also experimented using commercially available IC, LM13700. Moreover, the three phases sinusoidal oscillator based on proposed first order high-pass filter was designed and investigated by PSPICE simulation and experiment. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electronically tunable current-mode biquad filter employing CCCDTAs and grounded capacitors with low input and high output impedance(2013-12-01); ; ; In this study, a single-input multiple-outputs current-mode analog biquadratic filter, based on current controlled current differencing transconductance amplifier (CCCDTA) is presented. The proposed filter uses two CCCDTAs and two grounded capacitors without any external resistors, which is well suited for integrated circuit implementation. The filter simultaneously gives 3 standard transfer functions, namely, lowpass, highpass and bandpass filters with independent control of quality factor and pole frequency by electronic method. By summing of I<inf>HP</inf> and L<inf>LP</inf>, the notch filter can be also achieved. Moreover, the circuit has low input and high output impedance which would be an ideal choice for cascading in current-mode circuit. The PSPICE simulation results are included verifying the workability of the proposed filter. The given results agree well with the theoretical anticipation. © 2013 Elsevier GmbH.1