Pukkalanun, Tattaya
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Preferred name
Pukkalanun, Tattaya
Alternative Name
Pukkalanun, T.
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Email
tattaya.pu@kmitl.ac.th
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Item type:Publication, Dual-mode multifunction filter realized with a single voltage differencing gain amplifier (vdga)(2021-01-01); ; Channumsin, OrapinThis article presents the dual-mode multifunction biquad filter realized employing only a single voltage differencing gain amplifier (VDGA), one resistor and three capacitors. The proposed filterwith one input and three outputs can configure as voltage-mode or current-mode filter circuit with the appropriate input injection choice. It can also synthesis the three standard filter functions, which are highpass, bandpass, and lowpass responses without modifying the circuit configuration. Orthogonal adjustment between the natural angular frequency (ωo) and the quality factor (Q) of the filter is achieved. Detail analysis of non-ideal VDGA effects and circuit component sensitivity are included. The circuit principle is verified by means of simulation results with TSMC 0.35-μm CMOS process parameters. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Single VDGA-based dual-mode multifunction biquadratic filter and quadrature sinusoidal oscillator(2020-01-01); ; Channumsin, OrapinThis article relates to the realization of voltage-mode and/or current-mode multifunction biquadratic filter and quadrature oscillator circuits each using one voltage differencing gain amplifier (VDGA), two resistors and two grounded capacitors. The proposed dual-mode filter having one output and three inputs can provide the three standard biquadratic transfer functions with both voltage and current output filter responses simultaneously. It also has the independent tuning of the angular resonance frequency and the quality factor. With a slight modification of the proposed filter, a new dual-mode quadrature sinusoidal oscillator can be obtained. The proposed quadrature oscillator provides orthogonal resistive/electronic control of both oscillation condition and oscillation frequency. Non-ideal and parasitic conditions are also examined and their effects on the circuit performance are discussed. To confirm the theory, several computer simulation results with PSPICE program are given.