20.500.12556/DKUM-86523-292d0144-35c6-810c-e75b-a949de0f3814 Audio ojačevalnik AB razreda z digitalnim krmiljenjem diplomsko delo Class AB audio amplifier with digital control V diplomski nalogi smo temeljito raziskali teoretično podlago ojačevalnikov ter jo nadgradili z lastnim raziskovalnim delom. Zasnovali, naredili in preizkusili smo audio ojačevalnik razreda AB. Naša pozornost ni bila osredotočena zgolj na ojačevalnik, temveč smo se posvetili tudi napajalnemu delu ter upravljanju naprave prek občutljivega LCD zaslona. Izdelali smo vezje, ki deluje kot ojačevalnik, sposoben ojačiti signale v območju od 20 Hz do 20 kHz, torej frekvenčni pas signalov, ki jih človeško uho lahko teoretično zazna. Pri tem nismo pozabili na ustrezno napajanje, saj je kakovostno napajanje ključno za kakovostno delovanje ojačevalnika. Za optimizacijo uporabniške izkušnje smo vključili LCD zaslon na dotik, ki omogoča enostavno prilagajanje naprave človekovim potrebam. Pri izgradnji ojačevalnika smo za osnovno vezje izbrali čip TDA7294. Hkrati smo skrbno oblikovali napajalni del, da zagotovimo stabilno in učinkovito delovanje. Za upravljanje celotne naprave smo uporabili mikrokrmilnik STM32F750. Pravilnost delovanja izdelanih vezij smo preverili z uporabo raznolikih vhodnih signalov. S pomočjo osciloskopa smo izvedli meritve ter jih primerjali s pričakovanimi vrednostmi. In our thesis, we thoroughly explored the theoretical foundation of amplifiers and enhanced it with our own research work. We designed, created, tested, and precisely evaluated an AB class audio amplifier. Our focus wasn't solely on the amplifier; we also dedicated ourselves to the power supply section and the control of the device through a responsive touch-sensitive LCD screen. We developed a circuit that functions as an amplifier, capable of amplifying signals in the range of 20 Hz to 20 kHz – precisely those frequencies that the human ear can theoretically perceive. In doing so, we didn't overlook the importance of proper power supply, as high-quality powering is essential for the amplifier's optimal performance. To enhance the user experience, we incorporated a touch-sensitive LCD screen for easy customization of the device according to individual needs. For the amplifier's construction, we chose the TDA7294 chip as the core component of the basic circuit. Concurrently, we meticulously designed the power supply section to ensure stable and efficient operation. To manage the entire device, we turned to a microcontroller from the STM32F750 family. The correctness of the functioning of the developed circuits was verified using a variety of input signals. Through precise measurements conducted with an oscilloscope, we compared the results with the expected values. ojačevalnik LCD napajanje amplifier LCD supply true true false [Đ. Mikanović] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-12-07 09:20:36 2024-02-06 13:06:27 2024-03-23 03:14:26 0000-00-00 00:00:00 2023 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (VIII, 45 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.375(043.2) 189912579 VS_Mikanovic_Dorde_2024.pdf VS_Mikanovic_Dorde_2024.pdf 1 AFBF695593ED4C78E718CA898E43FEEF 73096f91fabd66a1078e209152620170202ae34c20c2ecc7ef1db8858525ed60 8bfba5f8-c4e7-11ee-b2aa-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=175948 VS_Mikanovic_Dorde_2023.zip VS_Mikanovic_Dorde_2023.zip 1 15F1739CD3AE2C0EDBD6E00966A4AFE4 0e4b2b991e88798f4b57edbe60602f6f49ea48f6c24acde41e289d9fdc3f6f3c 5323c140-94e3-11ee-a8bf-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174712 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0