Tattaya Pukkalanun

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— A realization of the CMOS digitally programmable current follower (DP-CF) suitable for low-voltage high-frequency application 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(More)
Keywords: Differential difference current conveyor transconductance amplifier (DDCCTA) Universal filter Voltage-mode circuit a b s t r a c t This paper presents a versatile voltage-mode universal active filter with one input and five output terminals. The proposed circuit is based on using the recently reported active building block, namely differential(More)
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Keywords: Differential difference current conveyor transconductance amplifier (DDCCTA) Voltage-mode circuit Universal filter Resistorless realization a b s t r a c t In this work, an electronically tunable universal voltage-mode biquadratic filter with single input and five outputs is introduced. The proposed filter structure only employs three differential(More)
— A two-input two-output (TITO) current-mode universal biquad using only four dual-output operational transconductance amplifier (DO-OTAs) and two grounded capacitors is described. By appropriately connecting the input and output terminals, the proposed circuit can provide lowpass, bandpass, highpass, bandstop and allpass current responses. The filter also(More)
This paper presents an alternative configuration for realizing a canonical voltage-mode first-order allpass (AP) section with electronic tuning. The proposed circuit is composed of only one CCCTA and one floating capacitor, which results in a simple and resistorless structure. Its phase response can be adjusted electronically through the external dc bias(More)
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