Electronically controlled square/triangular wave generator with amplitude adjustability and its application in light intensity measurement using commercial-off-the-shelf current feedback amplifiers

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dc.contributor.authorChoykhuntod, Pawich
dc.contributor.authorSotner, Roman
dc.contributor.authorSilapan, Phamorn
dc.contributor.authorKaewon, Rapeepan
dc.contributor.authorJaikla, Winai
dc.date.accessioned2026-08-06T10:51:45Z
dc.date.available2026-08-06T10:51:45Z
dc.date.issued2025-07-01
dc.description.abstractThis study presents a square and triangular waveform generator using two commercial-off-the-shelf current feedback amplifiers with DC gain control, LT1228. The frequency of the square and triangular waveforms can be electronically and independently adjusted with the bias current. With this advantage feature, the proposed generator can be easily modified to generate a sawtooth waveform and electronically adjust the duty cycle of square waves. Additionally, PWM signals can also be generated from the proposed circuit. The amplitude of both square and triangular waveforms is adjustable without affecting the frequency, and the output nodes have low impedance. The circuit's performance is validated through practical implementation and testing, showing excellent agreement with theoretical analysis. The measured linear and electronic adjustment of frequency spanned from 4.83 kHz to 436.2 kHz. Furthermore, the circuit can be applied as a low-cost light intensity detection sensor.
dc.identifier.citationAEU International Journal of Electronics and Communications, 197, 2025
dc.identifier.doi10.1016/j.aeue.2025.155840
dc.identifier.issn14348411
dc.identifier.other2-s2.0-105004546902
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17128
dc.sourceAEU International Journal of Electronics and Communications
dc.subjectCommercial-off-the-shelf ICs
dc.subjectElectronic adjusting
dc.subjectSawtooth wave
dc.subjectSquare and triangular waves
dc.subjectTunable duty cycle
dc.titleElectronically controlled square/triangular wave generator with amplitude adjustability and its application in light intensity measurement using commercial-off-the-shelf current feedback amplifiers
dc.typeArticle

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