KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Search Results

Now showing 1 - 10 of 14

Some of the metrics are blocked by your
consent settings
Dual-Mode Single-Input Three-Output Multifunction Filter and Quadrature Oscillator Consisting of Two Voltage Differencing Transconductance Amplifiers and Two Grounded Capacitors
(2023-04-01)
Tangsrirat, W.
;
Channumsin, O.
;
Unhavanich, S.
;
Pukkalanun, T.
Abstract: In this paper, we present the circuit configuration that can perform as a dual-mode (i.e., both voltage-mode and current-mode) multifunction filter as well as a dual-mode quadrature oscillator by slightly modifying the design. The presented configuration includes only two voltage differencing transconductance amplifiers and two grounded capacitors, resulting in a resistor-less construction. The dual-mode multifunction filter with one input and three outputs provides three standard biquadratic filter functions: highpass, bandpass, and lowpass, as well as independent electronic adjustment of its quality factor. The circuit can also be used to implement a dual-mode quadrature oscillator with orthogonal electronic control of the oscillation condition and the oscillation frequency. Simulation results based on 0.25-μm level-7 TSMC CMOS technology parameters are used to evaluate the behavior of the proposed dual-mode multifunction biquad and quadrature oscillator circuit.
Some of the metrics are blocked by your
consent settings
Tunable active grounded lossless and lossy inductance simulators with single grounded capacitor using VDBAs
(2022-04-01)
Tangsrirat, W.
;
Surakampontorn, W.
This study presents three active-C synthetic grounded inductance simulator circuits that realize tunable lossless and lossy series and parallel R-L type inductances. Each of these circuits employs two Voltage Differencing Buffered Amplifiers (VDBAs) as active components and a single grounded capacitor as a passive component. In all the proposed circuits, the simulated equivalent resistance and inductance values can be adjusted electronically through the transconductance gains of the VDBAs. They also do not require any critical component matching conditions and cancellation constraints. Details of non-ideal analysis including transfer errors of the VDBA has been analyzed. For circuit performance verification and comparison, some application examples are given together with computer simulation results by PSPICE program.
Some of the metrics are blocked by your
consent settings
On the Resistorless Realization of Simulated Tunable Floating Lossy Inductors with Voltage Differencing Buffered Amplifiers
(2021-04-01)
Pukkalanun, T.
;
Moonmuang, P.
;
Tangsrirat, W.
Abstract: Alternative circuit designs concerning the simulation of floating lossy inductors using voltage differencing buffered amplifiers (VDBAs) are described. The topologies proposed here require only three VDBAs and one capacitor to simulate a floating inductance with series and parallel resistance. The simulated equivalent elements, namely equivalent resistance (R<inf>eq</inf>) and equivalent inductance (L<inf>eq</inf>) are electronically controllable through the external bias currents of the VDBAs. The VDBA non-idealities including transconductance inaccuracy and voltage transfer error on the performance of the circuits has been discussed in detail. To support the theoretical analysis and demonstrate the practical workability of the proposed synthetic inductors, PSPICE simulation and experimental test results are also reported.
Some of the metrics are blocked by your
consent settings
Tunable Floating Capacitance Multiplier Using Single Fully Balanced Voltage Differencing Buffered Amplifier
(2019-08-01)
Tangsrirat, W.
;
Channumsin, O.
Abstract: An alternative circuit configuration for realizing an electronically adjustable floating capacitance multiplier is presented in this article. By consisting of only one fully balanced-voltage differencing buffered amplifier (FB-VDBA), one resistor and one capacitor, the presented multiplier circuit is canonical structure, and does not require any critical element matching constrain. The equivalent value of the simulated capacitance is adjustable by tuning the bias current of the FB-VDBA. The effect of the FB-VDBA non-idealities on the realized capacitance has been considered in detail. The proposed floating capacitance multiplier has been utilized, as an example application, in the design of a second-order RLC band-pass filter. To support the theory, some computer simulations with PSPICE software are also reported.
Some of the metrics are blocked by your
consent settings
Voltage Differencing Transconductance Amplifier-Based Quadrature Oscillator and Biquadratic Filter Realization with All Grounded Passive Elements
(2018-12-01)
Tangsrirat, W.
Abstract: The work realizes the sinusoidal quadrature oscillator and biquadratic filter with the same configuration using merely two voltage differencing transconductance amplifiers (VDTAs) as active devices and one grounded resistor and two grounded capacitor as passive elements. Performing the quadrature oscillator, the realized circuit is capable of producing two quadrature voltage outputs with almost equal amplitudes, and an independent electronic control of oscillation condition and oscillation frequency. Operating in voltage-mode biquadratic filter, the circuit can simultaneously generate the bandpass and lowpass filtering functions without any matching constraints. The natural angular frequency and the quality factor of the filter are independently and electronically adjustable. The effects of the VDTA non-idealities are also investigated in detail. Simulation results with TSMC 0.25 μm CMOS technology validate both working functions of the proposed circuit.
Some of the metrics are blocked by your
consent settings
Single-resistance-controlled quadrature oscillator using current differencing buffered amplifiers
(2008-01-01)
Tangsrirat, W.
;
Prasertsom, D.
;
Piyatat, T.
;
Surakampontorn, W.
A single-resistance-controlled quadrature oscillator circuit using current differencing buffered amplifiers (CDBAs) as active components is proposed. The proposed circuit is realised through the employment of two CDBAs, three resistors and two grounded capacitors. Outputs of two sinusoidal with 90 phase difference are available. The oscillation condition and the oscillation frequency of the proposed quadrature oscillator can be controlled independently by a single resistor. In comparison with the previously reported circuits, the proposed configuration considerably reduces the number of passive elements.
Some of the metrics are blocked by your
consent settings
Low-voltage NMOS-based current differencing buffered amplifier and its application to current-mode ladder filter design
(2006-11-01)
Tangsrirat, W.
;
Klahan, K.
;
Dumawipata, T.
;
Surakampontorn, W.
An integratable circuit technique to realize a low-voltage current differencing buffered amplifier (CDBA) is introduced. The realization scheme is through the modification of a low-input resistance CCII+ and the proposed CDBA can operate with the minimum supply voltage of ±1.25∈V. In order that the signal path consists of only NMOS transistors, a negative current mirror using NMOS transistors is employed. With standard 0.5∈μm CMOS process parameters, PSPICE simulation results show that the proposed CDBA provides the terminal resistance of , , and the -3∈dB bandwidth of about 500∈MHz. Application examples employing the proposed CDBA as active elements in the leapfrog simulation of current-mode ladder filters are also included.
Some of the metrics are blocked by your
consent settings
Realization of multiple-output biquadratic filters using current differencing buffered amplifiers
(2005-06-01)
Tangsrirat, W.
;
Surakampontorn, W.
In this paper, multiple-output multifunctional biquadratic filters using current differencing buffered amplifiers (CDBAs) as active elements are presented. The proposed circuit configuration is mainly composed of the CDBA-based cross-coupled feedback configuration and the simple CDBA-based voltage substractor. By an appropriate choice of virtually grounded passive components, the configuration 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 orthogonally controllable. Experimental results verifying the theoretical analysis are also given.
Some of the metrics are blocked by your
consent settings
Current differencing buffered amplifier based multiple-output biquadratic filters
(2005-01-01)
Pisitchalermpong, S.
;
Pukkalanun, T.
;
Tangsrirat, W.
;
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 your
consent settings
Electronically tunable quadrature oscillator using current-controlled voltage conveyors
(2005-01-01)
Piyatat, T.
;
Tangsrirat, W.
;
Surakampontorn, W.
A translinear-based bipolar realization of the current-controlled voltage conveyor (CCVC) is described. An electronically tunable quadrature oscillator is then proposed which uses only three proposed CCVCs and two grounded capacitors for its realization. The proposed oscillator circuit provides two quadrature sinusoidal outputs with 90° phase difference. The oscillation condition and the oscillation frequency are independently controllable by electronic means through adjusting the external dc bias current. PSPICE simulation results that confirm the theoretical are also given and discussed. © 2005 IEEE.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results