0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator

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dc.contributor.authorKhateb, Fabian
dc.contributor.authorKumngern, Montree
dc.contributor.authorKulej, Tomasz
dc.contributor.authorBiolek, Dalibor
dc.date.accessioned2026-08-06T10:36:45Z
dc.date.available2026-08-06T10:36:45Z
dc.date.issued2022-04-01
dc.description.abstractThis paper presents the extremely low-voltage supply of the CMOS structure of a differential difference transconductance amplifier (DDTA). With a 0.3-volt supply voltage, the circuit offers rail-to-rail operational capability. The circuit is designed for low-frequency biomedical and sensor applications, and it consumes 357.4 nW of power. Based on two DDTAs and two grounded capacitors, a voltage-mode universal filter and quadrature oscillator are presented as applications. The universal filter possesses high-input impedance and electronic tuning ability of the natural frequency in the range of tens up to hundreds of Hz. The total harmonic distortion (THD) for the band-pass filter was 0.5% for 100 mV<inf>pp</inf> @ 84.47 Hz input voltage. The slight modification of the filter yields a quadrature oscillator. The condition and the frequency of oscillation are orthogonally controllable. The frequency of oscillation can also be controlled electronically. The THD for a 67 Hz oscillation frequency was around 1.2%. The circuit is designed and simulated in a Cadence environment using 130 nm CMOS technology from United Microelectronics Corporation (UMC). The simulation results confirm the performance of the designed circuits.
dc.identifier.citationSensors, 22(7), 2022
dc.identifier.doi10.3390/s22072655
dc.identifier.issn14248220
dc.identifier.other2-s2.0-85127158375
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/13161
dc.sourceSensors
dc.subjectanalog signal processing
dc.subjectdifferential difference transconductance amplifier
dc.subjectquadrature oscillator
dc.subjectuniversal filter
dc.title0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator
dc.typeArticle

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